As to boy's names becoming girl's names (espec in the Middle Ages - there was a fashion amongst the great and the good for calling their daughters by masculine names. Dunno why!)
- you've all missed the one right under your noses!
My given name is Hilary but I am most certainly masculine, as those of us gathered here who've met me will attest.

EDIT:
Do you remeber the debate over my sex when I first joined the board? I had great fun with that!