diff --git a/packages/google-cloud-bigquery-datatransfer/CONTRIBUTING.rst b/packages/google-cloud-bigquery-datatransfer/CONTRIBUTING.rst
index ad8546e76c0f..7e25e6bc4689 100644
--- a/packages/google-cloud-bigquery-datatransfer/CONTRIBUTING.rst
+++ b/packages/google-cloud-bigquery-datatransfer/CONTRIBUTING.rst
@@ -80,25 +80,6 @@ We use `nox <https://nox.readthedocs.io/en/latest/>`__ to instrument our tests.
 
 .. nox: https://pypi.org/project/nox/
 
-Note on Editable Installs / Develop Mode
-========================================
-
-- As mentioned previously, using ``setuptools`` in `develop mode`_
-  or a ``pip`` `editable install`_ is not possible with this
-  library. This is because this library uses `namespace packages`_.
-  For context see `Issue #2316`_ and the relevant `PyPA issue`_.
-
-  Since ``editable`` / ``develop`` mode can't be used, packages
-  need to be installed directly. Hence your changes to the source
-  tree don't get incorporated into the **already installed**
-  package.
-
-.. _namespace packages: https://www.python.org/dev/peps/pep-0420/
-.. _Issue #2316: https://github.com/GoogleCloudPlatform/google-cloud-python/issues/2316
-.. _PyPA issue: https://github.com/pypa/packaging-problems/issues/12
-.. _develop mode: https://setuptools.readthedocs.io/en/latest/setuptools.html#development-mode
-.. _editable install: https://pip.pypa.io/en/stable/reference/pip_install/#editable-installs
-
 *****************************************
 I'm getting weird errors... Can you help?
 *****************************************
diff --git a/packages/google-cloud-bigquery-datatransfer/UPGRADING.md b/packages/google-cloud-bigquery-datatransfer/UPGRADING.md
index 4c157b23f9a9..0bac7ed1d949 100644
--- a/packages/google-cloud-bigquery-datatransfer/UPGRADING.md
+++ b/packages/google-cloud-bigquery-datatransfer/UPGRADING.md
@@ -38,8 +38,24 @@ The 2.0.0 release requires Python 3.6+.
 
 > **WARNING**: Breaking change
 
-The library was moved into `google.cloud.bigquery` namespace. Existing imports
-need to be updated.
+
+### Version 2.1.0
+
+The library had its old namespace restored, since importing from
+`google.cloud.bigquery` clashed with the `google-cloud-bigquery` library when the
+latter was also installed.
+
+The import paths that were changed in version `2.0.0` should be reverted:
+
+```py
+from google.cloud import bigquery_datatransfer
+from google.cloud import bigquery_datatransfer_v1
+```
+
+### Version 2.0.0
+
+(obsolete) The library was moved into `google.cloud.bigquery` namespace. Existing
+imports need to be updated, unless using a version `>=2.1.0`.
 
 **Before:**
 ```py
diff --git a/packages/google-cloud-bigquery-datatransfer/docs/datatransfer_v1/services.rst b/packages/google-cloud-bigquery-datatransfer/docs/bigquery_datatransfer_v1/services.rst
similarity index 72%
rename from packages/google-cloud-bigquery-datatransfer/docs/datatransfer_v1/services.rst
rename to packages/google-cloud-bigquery-datatransfer/docs/bigquery_datatransfer_v1/services.rst
index 46c2ba6f8cfa..8dddd817811a 100644
--- a/packages/google-cloud-bigquery-datatransfer/docs/datatransfer_v1/services.rst
+++ b/packages/google-cloud-bigquery-datatransfer/docs/bigquery_datatransfer_v1/services.rst
@@ -1,6 +1,6 @@
 Services for Google Cloud Bigquery Datatransfer v1 API
 ======================================================
 
-.. automodule:: google.cloud.bigquery.datatransfer_v1.services.data_transfer_service
+.. automodule:: google.cloud.bigquery_datatransfer_v1.services.data_transfer_service
     :members:
     :inherited-members:
diff --git a/packages/google-cloud-bigquery-datatransfer/docs/datatransfer_v1/types.rst b/packages/google-cloud-bigquery-datatransfer/docs/bigquery_datatransfer_v1/types.rst
similarity index 66%
rename from packages/google-cloud-bigquery-datatransfer/docs/datatransfer_v1/types.rst
rename to packages/google-cloud-bigquery-datatransfer/docs/bigquery_datatransfer_v1/types.rst
index 6e8bc0008011..e47782ffac13 100644
--- a/packages/google-cloud-bigquery-datatransfer/docs/datatransfer_v1/types.rst
+++ b/packages/google-cloud-bigquery-datatransfer/docs/bigquery_datatransfer_v1/types.rst
@@ -1,5 +1,5 @@
 Types for Google Cloud Bigquery Datatransfer v1 API
 ===================================================
 
-.. automodule:: google.cloud.bigquery.datatransfer_v1.types
+.. automodule:: google.cloud.bigquery_datatransfer_v1.types
     :members:
diff --git a/packages/google-cloud-bigquery-datatransfer/docs/conf.py b/packages/google-cloud-bigquery-datatransfer/docs/conf.py
index 41549e0722f4..fab78815ee73 100644
--- a/packages/google-cloud-bigquery-datatransfer/docs/conf.py
+++ b/packages/google-cloud-bigquery-datatransfer/docs/conf.py
@@ -39,6 +39,7 @@
     "sphinx.ext.autosummary",
     "sphinx.ext.intersphinx",
     "sphinx.ext.coverage",
+    "sphinx.ext.doctest",
     "sphinx.ext.napoleon",
     "sphinx.ext.todo",
     "sphinx.ext.viewcode",
diff --git a/packages/google-cloud-bigquery-datatransfer/docs/index.rst b/packages/google-cloud-bigquery-datatransfer/docs/index.rst
index 824b52076097..46d9325153c6 100644
--- a/packages/google-cloud-bigquery-datatransfer/docs/index.rst
+++ b/packages/google-cloud-bigquery-datatransfer/docs/index.rst
@@ -8,8 +8,8 @@ API Reference
 .. toctree::
    :maxdepth: 2
 
-    Client <datatransfer_v1/services>
-    Types <datatransfer_v1/types>
+    Client <bigquery_datatransfer_v1/services>
+    Types <bigquery_datatransfer_v1/types>
 
 
 Migration Guide
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer/__init__.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer/__init__.py
similarity index 56%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer/__init__.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer/__init__.py
index 55860e3fd5e7..721bb151205c 100644
--- a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer/__init__.py
+++ b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer/__init__.py
@@ -15,84 +15,84 @@
 # limitations under the License.
 #
 
-from google.cloud.bigquery.datatransfer_v1.services.data_transfer_service.async_client import (
+from google.cloud.bigquery_datatransfer_v1.services.data_transfer_service.async_client import (
     DataTransferServiceAsyncClient,
 )
-from google.cloud.bigquery.datatransfer_v1.services.data_transfer_service.client import (
+from google.cloud.bigquery_datatransfer_v1.services.data_transfer_service.client import (
     DataTransferServiceClient,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     CheckValidCredsRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     CheckValidCredsResponse,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     CreateTransferConfigRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import DataSource
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import DataSourceParameter
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import DataSource
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import DataSourceParameter
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     DeleteTransferConfigRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     DeleteTransferRunRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     GetDataSourceRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     GetTransferConfigRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     GetTransferRunRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ListDataSourcesRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ListDataSourcesResponse,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ListTransferConfigsRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ListTransferConfigsResponse,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ListTransferLogsRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ListTransferLogsResponse,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ListTransferRunsRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ListTransferRunsResponse,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ScheduleTransferRunsRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     ScheduleTransferRunsResponse,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     StartManualTransferRunsRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     StartManualTransferRunsResponse,
 )
-from google.cloud.bigquery.datatransfer_v1.types.datatransfer import (
+from google.cloud.bigquery_datatransfer_v1.types.datatransfer import (
     UpdateTransferConfigRequest,
 )
-from google.cloud.bigquery.datatransfer_v1.types.transfer import EmailPreferences
-from google.cloud.bigquery.datatransfer_v1.types.transfer import ScheduleOptions
-from google.cloud.bigquery.datatransfer_v1.types.transfer import TransferConfig
-from google.cloud.bigquery.datatransfer_v1.types.transfer import TransferMessage
-from google.cloud.bigquery.datatransfer_v1.types.transfer import TransferRun
-from google.cloud.bigquery.datatransfer_v1.types.transfer import TransferState
-from google.cloud.bigquery.datatransfer_v1.types.transfer import TransferType
+from google.cloud.bigquery_datatransfer_v1.types.transfer import EmailPreferences
+from google.cloud.bigquery_datatransfer_v1.types.transfer import ScheduleOptions
+from google.cloud.bigquery_datatransfer_v1.types.transfer import TransferConfig
+from google.cloud.bigquery_datatransfer_v1.types.transfer import TransferMessage
+from google.cloud.bigquery_datatransfer_v1.types.transfer import TransferRun
+from google.cloud.bigquery_datatransfer_v1.types.transfer import TransferState
+from google.cloud.bigquery_datatransfer_v1.types.transfer import TransferType
 
 __all__ = (
     "CheckValidCredsRequest",
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer/py.typed b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer/py.typed
similarity index 100%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer/py.typed
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer/py.typed
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/__init__.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/__init__.py
similarity index 100%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/__init__.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/__init__.py
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/py.typed b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/py.typed
similarity index 100%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/py.typed
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/py.typed
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/__init__.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/__init__.py
similarity index 100%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/__init__.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/__init__.py
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/__init__.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/__init__.py
similarity index 100%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/__init__.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/__init__.py
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/async_client.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/async_client.py
similarity index 99%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/async_client.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/async_client.py
index 2bbd0f2f053c..da83e37e3096 100644
--- a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/async_client.py
+++ b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/async_client.py
@@ -28,9 +28,9 @@
 from google.auth import credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
 
-from google.cloud.bigquery.datatransfer_v1.services.data_transfer_service import pagers
-from google.cloud.bigquery.datatransfer_v1.types import datatransfer
-from google.cloud.bigquery.datatransfer_v1.types import transfer
+from google.cloud.bigquery_datatransfer_v1.services.data_transfer_service import pagers
+from google.cloud.bigquery_datatransfer_v1.types import datatransfer
+from google.cloud.bigquery_datatransfer_v1.types import transfer
 from google.protobuf import duration_pb2 as duration  # type: ignore
 from google.protobuf import field_mask_pb2 as field_mask  # type: ignore
 from google.protobuf import struct_pb2 as struct  # type: ignore
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/client.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/client.py
similarity index 99%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/client.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/client.py
index 2c3c755bdd62..f4cd6199644b 100644
--- a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/client.py
+++ b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/client.py
@@ -32,9 +32,9 @@
 from google.auth.exceptions import MutualTLSChannelError  # type: ignore
 from google.oauth2 import service_account  # type: ignore
 
-from google.cloud.bigquery.datatransfer_v1.services.data_transfer_service import pagers
-from google.cloud.bigquery.datatransfer_v1.types import datatransfer
-from google.cloud.bigquery.datatransfer_v1.types import transfer
+from google.cloud.bigquery_datatransfer_v1.services.data_transfer_service import pagers
+from google.cloud.bigquery_datatransfer_v1.types import datatransfer
+from google.cloud.bigquery_datatransfer_v1.types import transfer
 from google.protobuf import duration_pb2 as duration  # type: ignore
 from google.protobuf import field_mask_pb2 as field_mask  # type: ignore
 from google.protobuf import struct_pb2 as struct  # type: ignore
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/pagers.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/pagers.py
similarity index 99%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/pagers.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/pagers.py
index 922e208624e1..d1bb2a72f2c2 100644
--- a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/pagers.py
+++ b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/pagers.py
@@ -17,8 +17,8 @@
 
 from typing import Any, AsyncIterable, Awaitable, Callable, Iterable, Sequence, Tuple
 
-from google.cloud.bigquery.datatransfer_v1.types import datatransfer
-from google.cloud.bigquery.datatransfer_v1.types import transfer
+from google.cloud.bigquery_datatransfer_v1.types import datatransfer
+from google.cloud.bigquery_datatransfer_v1.types import transfer
 
 
 class ListDataSourcesPager:
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/__init__.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/__init__.py
similarity index 100%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/__init__.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/__init__.py
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/base.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/base.py
similarity index 99%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/base.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/base.py
index d4d82fa2b8d7..8d2f456937d4 100644
--- a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/base.py
+++ b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/base.py
@@ -25,8 +25,8 @@
 from google.api_core import retry as retries  # type: ignore
 from google.auth import credentials  # type: ignore
 
-from google.cloud.bigquery.datatransfer_v1.types import datatransfer
-from google.cloud.bigquery.datatransfer_v1.types import transfer
+from google.cloud.bigquery_datatransfer_v1.types import datatransfer
+from google.cloud.bigquery_datatransfer_v1.types import transfer
 from google.protobuf import empty_pb2 as empty  # type: ignore
 
 
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/grpc.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/grpc.py
similarity index 99%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/grpc.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/grpc.py
index 282f8eb7776d..8ac75a7c0a65 100644
--- a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/grpc.py
+++ b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/grpc.py
@@ -26,8 +26,8 @@
 
 import grpc  # type: ignore
 
-from google.cloud.bigquery.datatransfer_v1.types import datatransfer
-from google.cloud.bigquery.datatransfer_v1.types import transfer
+from google.cloud.bigquery_datatransfer_v1.types import datatransfer
+from google.cloud.bigquery_datatransfer_v1.types import transfer
 from google.protobuf import empty_pb2 as empty  # type: ignore
 
 from .base import DataTransferServiceTransport, DEFAULT_CLIENT_INFO
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/grpc_asyncio.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/grpc_asyncio.py
similarity index 99%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/grpc_asyncio.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/grpc_asyncio.py
index 32f5706c2eb7..c4220d113977 100644
--- a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/services/data_transfer_service/transports/grpc_asyncio.py
+++ b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/services/data_transfer_service/transports/grpc_asyncio.py
@@ -27,8 +27,8 @@
 import grpc  # type: ignore
 from grpc.experimental import aio  # type: ignore
 
-from google.cloud.bigquery.datatransfer_v1.types import datatransfer
-from google.cloud.bigquery.datatransfer_v1.types import transfer
+from google.cloud.bigquery_datatransfer_v1.types import datatransfer
+from google.cloud.bigquery_datatransfer_v1.types import transfer
 from google.protobuf import empty_pb2 as empty  # type: ignore
 
 from .base import DataTransferServiceTransport, DEFAULT_CLIENT_INFO
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/types/__init__.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/types/__init__.py
similarity index 100%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/types/__init__.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/types/__init__.py
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/types/datatransfer.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/types/datatransfer.py
similarity index 99%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/types/datatransfer.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/types/datatransfer.py
index f067a49af802..2fab069945e2 100644
--- a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/types/datatransfer.py
+++ b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/types/datatransfer.py
@@ -18,7 +18,7 @@
 import proto  # type: ignore
 
 
-from google.cloud.bigquery.datatransfer_v1.types import transfer
+from google.cloud.bigquery_datatransfer_v1.types import transfer
 from google.protobuf import duration_pb2 as duration  # type: ignore
 from google.protobuf import field_mask_pb2 as field_mask  # type: ignore
 from google.protobuf import timestamp_pb2 as timestamp  # type: ignore
diff --git a/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/types/transfer.py b/packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/types/transfer.py
similarity index 100%
rename from packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery/datatransfer_v1/types/transfer.py
rename to packages/google-cloud-bigquery-datatransfer/google/cloud/bigquery_datatransfer_v1/types/transfer.py
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/create_scheduled_query.py b/packages/google-cloud-bigquery-datatransfer/samples/create_scheduled_query.py
index a05cfd13291d..297e1f734f4e 100644
--- a/packages/google-cloud-bigquery-datatransfer/samples/create_scheduled_query.py
+++ b/packages/google-cloud-bigquery-datatransfer/samples/create_scheduled_query.py
@@ -20,9 +20,9 @@
 
 def sample_create_transfer_config(project_id, dataset_id, authorization_code=""):
     # [START bigquerydatatransfer_create_scheduled_query]
-    from google.cloud.bigquery import datatransfer_v1
+    from google.cloud import bigquery_datatransfer
 
-    client = datatransfer_v1.DataTransferServiceClient()
+    client = bigquery_datatransfer.DataTransferServiceClient()
 
     # TODO(developer): Set the project_id to the project that contains the
     #                  destination dataset.
@@ -54,7 +54,7 @@ def sample_create_transfer_config(project_id, dataset_id, authorization_code="")
 
     parent = f"projects/{project_id}"
 
-    transfer_config = datatransfer_v1.types.TransferConfig(
+    transfer_config = bigquery_datatransfer.TransferConfig(
         destination_dataset_id=dataset_id,
         display_name="Your Scheduled Query Name",
         data_source_id="scheduled_query",
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/snippets/quickstart.py b/packages/google-cloud-bigquery-datatransfer/samples/snippets/quickstart.py
index 347ccdbf5f7c..042a6459d6c1 100644
--- a/packages/google-cloud-bigquery-datatransfer/samples/snippets/quickstart.py
+++ b/packages/google-cloud-bigquery-datatransfer/samples/snippets/quickstart.py
@@ -17,9 +17,9 @@
 
 def run_quickstart(project="my-project"):
     # [START bigquerydatatransfer_quickstart]
-    from google.cloud.bigquery import datatransfer
+    from google.cloud import bigquery_datatransfer
 
-    client = datatransfer.DataTransferServiceClient()
+    client = bigquery_datatransfer.DataTransferServiceClient()
 
     # TODO: Update to your project ID.
     # project = "my-project"
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/tests/conftest.py b/packages/google-cloud-bigquery-datatransfer/samples/tests/conftest.py
index 05e32436a3b0..90589e8b9838 100644
--- a/packages/google-cloud-bigquery-datatransfer/samples/tests/conftest.py
+++ b/packages/google-cloud-bigquery-datatransfer/samples/tests/conftest.py
@@ -39,9 +39,9 @@ def credentials():
 
 @pytest.fixture(scope="module")
 def bqdts_client(credentials):
-    from google.cloud.bigquery import datatransfer_v1
+    from google.cloud import bigquery_datatransfer
 
-    return datatransfer_v1.DataTransferServiceClient(credentials=credentials)
+    return bigquery_datatransfer.DataTransferServiceClient(credentials=credentials)
 
 
 @pytest.fixture(scope="module")
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/update_transfer_config.py b/packages/google-cloud-bigquery-datatransfer/samples/update_transfer_config.py
index c1f4190cd486..11e21ddb405c 100644
--- a/packages/google-cloud-bigquery-datatransfer/samples/update_transfer_config.py
+++ b/packages/google-cloud-bigquery-datatransfer/samples/update_transfer_config.py
@@ -20,9 +20,9 @@
 
 def sample_update_transfer_config(config_name, display_name):
     # [START bigquerydatatransfer_update_transfer_config]
-    from google.cloud.bigquery import datatransfer_v1
+    from google.cloud import bigquery_datatransfer
 
-    client = datatransfer_v1.DataTransferServiceClient()
+    client = bigquery_datatransfer.DataTransferServiceClient()
     # TODO(developer): Set the config_name which user wants to update.
     # config_name = "your-created-transfer-config-name"
 
diff --git a/packages/google-cloud-bigquery-datatransfer/scripts/fixup_datatransfer_v1_keywords.py b/packages/google-cloud-bigquery-datatransfer/scripts/fixup_bigquery_datatransfer_v1_keywords.py
similarity index 96%
rename from packages/google-cloud-bigquery-datatransfer/scripts/fixup_datatransfer_v1_keywords.py
rename to packages/google-cloud-bigquery-datatransfer/scripts/fixup_bigquery_datatransfer_v1_keywords.py
index f5fcc272f044..a8fbf7c550c1 100644
--- a/packages/google-cloud-bigquery-datatransfer/scripts/fixup_datatransfer_v1_keywords.py
+++ b/packages/google-cloud-bigquery-datatransfer/scripts/fixup_bigquery_datatransfer_v1_keywords.py
@@ -37,7 +37,7 @@ def partition(
     return results[1], results[0]
 
 
-class datatransferCallTransformer(cst.CSTTransformer):
+class bigquery_datatransferCallTransformer(cst.CSTTransformer):
     CTRL_PARAMS: Tuple[str] = ('retry', 'timeout', 'metadata')
     METHOD_TO_PARAMS: Dict[str, Tuple[str]] = {
     'check_valid_creds': ('name', ),
@@ -103,7 +103,7 @@ def fix_files(
     in_dir: pathlib.Path,
     out_dir: pathlib.Path,
     *,
-    transformer=datatransferCallTransformer(),
+    transformer=bigquery_datatransferCallTransformer(),
 ):
     """Duplicate the input dir to the output dir, fixing file method calls.
 
@@ -136,7 +136,7 @@ def fix_files(
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(
-        description="""Fix up source that uses the datatransfer client library.
+        description="""Fix up source that uses the bigquery_datatransfer client library.
 
 The existing sources are NOT overwritten but are copied to output_dir with changes made.
 
diff --git a/packages/google-cloud-bigquery-datatransfer/setup.py b/packages/google-cloud-bigquery-datatransfer/setup.py
index c44d66952733..2a553128f3ea 100644
--- a/packages/google-cloud-bigquery-datatransfer/setup.py
+++ b/packages/google-cloud-bigquery-datatransfer/setup.py
@@ -57,9 +57,6 @@
 if "google.cloud" in packages:
     namespaces.append("google.cloud")
 
-if "google.cloud.bigquery" in packages:
-    namespaces.append("google.cloud.bigquery")
-
 setuptools.setup(
     name=name,
     version=version,
@@ -87,7 +84,7 @@
     install_requires=dependencies,
     extras_require=extras,
     python_requires=">=3.6",
-    scripts=["scripts/fixup_datatransfer_v1_keywords.py"],
+    scripts=["scripts/fixup_bigquery_datatransfer_v1_keywords.py"],
     include_package_data=True,
     zip_safe=False,
 )
diff --git a/packages/google-cloud-bigquery-datatransfer/synth.metadata b/packages/google-cloud-bigquery-datatransfer/synth.metadata
index 30c7dbc52ac0..20b58a931e2c 100644
--- a/packages/google-cloud-bigquery-datatransfer/synth.metadata
+++ b/packages/google-cloud-bigquery-datatransfer/synth.metadata
@@ -4,21 +4,21 @@
       "git": {
         "name": ".",
         "remote": "git@github.com:plamut/python-bigquery-datatransfer.git",
-        "sha": "b1bdf7efd37c00871a8716340a45184a20acb4ad"
+        "sha": "41256eec1994fbff48894c7055e6440b4e636628"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "dba48bb9bc6959c232bec9150ac6313b608fe7bd"
+        "sha": "da29da32b3a988457b49ae290112b74f14b713cc"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "dba48bb9bc6959c232bec9150ac6313b608fe7bd"
+        "sha": "da29da32b3a988457b49ae290112b74f14b713cc"
       }
     }
   ],
diff --git a/packages/google-cloud-bigquery-datatransfer/synth.py b/packages/google-cloud-bigquery-datatransfer/synth.py
index ee143409444a..abfa2af98756 100644
--- a/packages/google-cloud-bigquery-datatransfer/synth.py
+++ b/packages/google-cloud-bigquery-datatransfer/synth.py
@@ -54,12 +54,12 @@
 
 # Fix missing async client in datatransfer_v1
 s.replace(
-    "google/cloud/bigquery/datatransfer_v1/__init__.py",
+    "google/cloud/bigquery_datatransfer_v1/__init__.py",
     r"from \.services\.data_transfer_service import DataTransferServiceClient",
     "\g<0>\nfrom .services.data_transfer_service import DataTransferServiceAsyncClient",
 )
 s.replace(
-    "google/cloud/bigquery/datatransfer_v1/__init__.py",
+    "google/cloud/bigquery_datatransfer_v1/__init__.py",
     r"'DataTransferServiceClient',",
     '\g<0>\n    "DataTransferServiceAsyncClient"',
 )
diff --git a/packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/datatransfer_v1/__init__.py b/packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/bigquery_datatransfer_v1/__init__.py
similarity index 100%
rename from packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/datatransfer_v1/__init__.py
rename to packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/bigquery_datatransfer_v1/__init__.py
diff --git a/packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/datatransfer_v1/test_data_transfer_service.py b/packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/bigquery_datatransfer_v1/test_data_transfer_service.py
similarity index 99%
rename from packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/datatransfer_v1/test_data_transfer_service.py
rename to packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/bigquery_datatransfer_v1/test_data_transfer_service.py
index 249f6f382434..63e74a84c940 100644
--- a/packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/datatransfer_v1/test_data_transfer_service.py
+++ b/packages/google-cloud-bigquery-datatransfer/tests/unit/gapic/bigquery_datatransfer_v1/test_data_transfer_service.py
@@ -32,18 +32,18 @@
 from google.api_core import grpc_helpers_async
 from google.auth import credentials
 from google.auth.exceptions import MutualTLSChannelError
-from google.cloud.bigquery.datatransfer_v1.services.data_transfer_service import (
+from google.cloud.bigquery_datatransfer_v1.services.data_transfer_service import (
     DataTransferServiceAsyncClient,
 )
-from google.cloud.bigquery.datatransfer_v1.services.data_transfer_service import (
+from google.cloud.bigquery_datatransfer_v1.services.data_transfer_service import (
     DataTransferServiceClient,
 )
-from google.cloud.bigquery.datatransfer_v1.services.data_transfer_service import pagers
-from google.cloud.bigquery.datatransfer_v1.services.data_transfer_service import (
+from google.cloud.bigquery_datatransfer_v1.services.data_transfer_service import pagers
+from google.cloud.bigquery_datatransfer_v1.services.data_transfer_service import (
     transports,
 )
-from google.cloud.bigquery.datatransfer_v1.types import datatransfer
-from google.cloud.bigquery.datatransfer_v1.types import transfer
+from google.cloud.bigquery_datatransfer_v1.types import datatransfer
+from google.cloud.bigquery_datatransfer_v1.types import transfer
 from google.oauth2 import service_account
 from google.protobuf import duration_pb2 as duration  # type: ignore
 from google.protobuf import field_mask_pb2 as field_mask  # type: ignore
@@ -455,7 +455,7 @@ def test_data_transfer_service_client_client_options_credentials_file(
 
 def test_data_transfer_service_client_client_options_from_dict():
     with mock.patch(
-        "google.cloud.bigquery.datatransfer_v1.services.data_transfer_service.transports.DataTransferServiceGrpcTransport.__init__"
+        "google.cloud.bigquery_datatransfer_v1.services.data_transfer_service.transports.DataTransferServiceGrpcTransport.__init__"
     ) as grpc_transport:
         grpc_transport.return_value = None
         client = DataTransferServiceClient(
@@ -4318,7 +4318,7 @@ def test_data_transfer_service_base_transport_error():
 def test_data_transfer_service_base_transport():
     # Instantiate the base transport.
     with mock.patch(
-        "google.cloud.bigquery.datatransfer_v1.services.data_transfer_service.transports.DataTransferServiceTransport.__init__"
+        "google.cloud.bigquery_datatransfer_v1.services.data_transfer_service.transports.DataTransferServiceTransport.__init__"
     ) as Transport:
         Transport.return_value = None
         transport = transports.DataTransferServiceTransport(
@@ -4353,7 +4353,7 @@ def test_data_transfer_service_base_transport_with_credentials_file():
     with mock.patch.object(
         auth, "load_credentials_from_file"
     ) as load_creds, mock.patch(
-        "google.cloud.bigquery.datatransfer_v1.services.data_transfer_service.transports.DataTransferServiceTransport._prep_wrapped_messages"
+        "google.cloud.bigquery_datatransfer_v1.services.data_transfer_service.transports.DataTransferServiceTransport._prep_wrapped_messages"
     ) as Transport:
         Transport.return_value = None
         load_creds.return_value = (credentials.AnonymousCredentials(), None)
@@ -4370,7 +4370,7 @@ def test_data_transfer_service_base_transport_with_credentials_file():
 def test_data_transfer_service_base_transport_with_adc():
     # Test the default credentials are used if credentials and credentials_file are None.
     with mock.patch.object(auth, "default") as adc, mock.patch(
-        "google.cloud.bigquery.datatransfer_v1.services.data_transfer_service.transports.DataTransferServiceTransport._prep_wrapped_messages"
+        "google.cloud.bigquery_datatransfer_v1.services.data_transfer_service.transports.DataTransferServiceTransport._prep_wrapped_messages"
     ) as Transport:
         Transport.return_value = None
         adc.return_value = (credentials.AnonymousCredentials(), None)
diff --git a/packages/google-cloud-bigquery-datatransfer/tests/unit/test_shim.py b/packages/google-cloud-bigquery-datatransfer/tests/unit/test_shim.py
index eff54512c624..bf80d60b5670 100644
--- a/packages/google-cloud-bigquery-datatransfer/tests/unit/test_shim.py
+++ b/packages/google-cloud-bigquery-datatransfer/tests/unit/test_shim.py
@@ -18,12 +18,14 @@
 
 
 def test_shim():
-    from google.cloud.bigquery import datatransfer
-    from google.cloud.bigquery import datatransfer_v1
+    from google.cloud import bigquery_datatransfer
+    from google.cloud import bigquery_datatransfer_v1
 
-    assert sorted(datatransfer.__all__) == sorted(datatransfer_v1.__all__)
+    assert sorted(bigquery_datatransfer.__all__) == sorted(
+        bigquery_datatransfer_v1.__all__
+    )
 
-    for name in datatransfer.__all__:
-        found = getattr(datatransfer, name)
-        expected = getattr(datatransfer_v1, name)
+    for name in bigquery_datatransfer.__all__:
+        found = getattr(bigquery_datatransfer, name)
+        expected = getattr(bigquery_datatransfer_v1, name)
         assert found is expected