Tholoth

Tholoth was the homeworld of the Tholothian Jedi Masters Stass Allie and Adi Gallia, both of whom fought and died during the Clone Wars.

Behind the scenes
Tholoth was first mentioned in Labyrinth of Evil, a Star Wars Legends novel written by James Luceno and released in 2005. The world was confirmed to be canon by the reference book Ultimate Star Wars, which was released in 2015.