I usually play the Origins copy.

White Mage: Jenica. Liked the name from DOS, so I kept it.
Warrior: Kristy. Male or female, it matters not to me. If you insist on a guy's name, call him Chris.
Monk: Mateo. Spanish version of my name.
Thief: Rob. What better name is there for a thief?
Black Mage: Sarah. Around here, where there's a Jenny (or any name close), there will always be a Sarah nearby.
Red Mage: Steve. Named after my brother because he is a jack-of-all-trades type.