I haven't read the entire thread, just some of the first and last posts, so pardon me if I'm repeating anything...

A couple of thoughts:

The woman's name "Jeanne" is pronounced in the French manner here in Louisiana ~ "Zhaahn" is a phonetic approximation ~ but in the rest of the US, it is almost always read as though pronounced "Jean"/"Gene."

I once had a female coworker named Trevor. This name is uncommon enough herebaouts that some folks would be introduced and not react at all, but most of us who had any familarily at all with the name Trevor usually recognized it as a man's name and thus reacted with some kind of "double-take.".

McGrath listed a number of "men's names taken over by women" including Evelyn, Shirly, Beverly, and others. I would observe that, in the US, all of these names are almost exclusively used for females, and people tend to ridicule the very idea of these names being used for (British) males.