This may just win the award for most esoteric question ever asked on this board.
Sorry, I can't help you; I'm not familiar with the D20 System or Third Edition versions of AD&D, so I didn't even know that they could be any gender they chose.
I'd definitely pick one of the dirty Elf god/desses, though. Preferably a goddess of wimpy woodland creatures or virgin tracts of forest (think of the mythological consequences).