[Opinions] Re: can Sylvester or Sylvan be use as female name?
Sylvester is not a girls' name. Never was, never should be. It's comical enough on a boy what with Stallone and Sylvester the Pussycat and the seventies disco singer.
Sylvan might just work but in the US it's the name of a for-profit test-preparedness academy.
Sylvie is used as a full name in France and if you're that set on Sylvie just use it.
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Steve Martin