Dak'kon, companion of The Nameless One, from Planescape: Torment is mentioned as a Githzerai hero in the game.
source: en.wikipedia.org/wiki/Planescape:_Torment#Dak.27kon_the_Pariah
source: en.wikipedia.org/wiki/Planescape:_Torment#Dak.27kon_the_Pariah