Esme is another...it was used in 16th cent Scotland as a man's name but seems to have transmogrified (love that word!) into a woman's name. My mother had a friend called Esme.
Andre (m) / Andree (f)
Adrian (m) / Adrienne (f)
Vivian, Vyvyan (m) / Vivienne (f)
Wasn't Oscar Wilde's son called Vyvyan?
Cheers
JennieG