Boy names & additional question

JoAnn
Zephan (nn Zeph) is my favorite but there is a Zef that works at the dept with my fiancé and I.  It's a large dept and I've never even met the guy but it is a rare name so I have a feeling my fiancé won't  want to use the name for that reason. So as a side question, would something like that deter you from using a name you liked? 
Thanks 😁

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