There are apparently several female Warlocks in TR. Erissare, Gwynern, Nela Dervany, and Margia Sycora for example.

The problem here is that Warlock is the male-specific equivalent class to the female Witch. The use of this class should, I think, be corrected.

Important: Margia Sycora is not a witch (she says so), but an alchemist.