Jade

There are two troll females in the Discworld canon named Jade.

Princess Jade, who was educated at Quirm College for Young Ladies at the same time as Susan and Gloria Thogsdaughter, during the events of Soul Music.

There is also a troll named Jade in Monstrous Regiment. She adopted the alias Carborundum in order to look more male to the Borogravian Army recruiters, proved incapable of holding her drink, but helped the actual Monstrous Regiment (what there is of it) along with Polly Perks to a definitive (well - for now) truce with the Zlobenians.