Update CONTRIBUTING.md

Clarify first names are OK

CONTRIBUTING.md

@@ -12,7 +12,7 @@ If you would like to include a new font family in the Google Fonts collection, w
 * The project is **wholly** licensed under the [SIL Open Font License v1.1](http://scripts.sil.org/OFL), and there are no proprietary/restricted-license versions available elsewhere
 * The Open Font License does not have any Reserved Font Names ([why](https://github.com/simoncozens/silson/issues/1))
 * The copyright holders have all signed the [Google Contributor's License Agreement](https://cla.developers.google.com)
-* The font family name does not include any copyright holder names or registered trademarks, and no initials or abbreviations, and no references to languages or writing systems; it should be a simple and unique name, and a limited but easy way to test for uniqueness is [namecheck.fontdata.com](https://namecheck.fontdata.com)  
+* The font family name does not include any copyright holder full names (but first names are OK), no registered trademarks, and no initials or abbreviations, and no references to languages or writing systems; it should be a simple and unique name. A limited but easy way to test for uniqueness is [namecheck.fontdata.com](https://namecheck.fontdata.com)  
 * The project is developed on Github or similar, with complete corresponding sources, [open to public participation](http://producingoss.com), and actively maintained. Complete corresponding sources means that the fonts are available in your preferred form of modification, the files you actually use to develop the project, along with all the build instructions or scripts needed to  reproduce the process of turning those source files into your released font binaries.  
 * All binary font files are available in TTF format, with hinting (such as with [ttfautohint](http://www.freetype.org/ttfautohint/)) and built with a scripted build process, using [fontmake](https://github.com/googlefonts/fontmake)
 * All font files have at a minimum the 215 glyphs listed in our [`latin_unique-glyphs.nam`](https://github.com/googlefonts/gftools/blob/master/Lib/gftools/encodings/latin_unique-glyphs.nam) file