I used the random names and wound up with Mikoto (mostly chosen because if I ever saw a sequel to IX, I'd want to see her involved somehow), so I guess mine's female. I always assumed the white mage was female anyway, since I didn't play any game prior to and inclusive of VI I until it was released on PSOne, and the white mages were all female up to that point. Thanks to IX, I also just assumed the Black Mage was male.