Yaddith is a planet harboring an intelligent extraterrestrial race.
Eons ago it was inhabited by the Nug-Soth, creatures with traits similar to mammals, reptiles, and insects. The Nug-Soth sought a way to prevent the destruction of their planet's crust by the Dholes, but to no avail. Eventually, the Dholes overwhelmed them and destroyed the Nug-Soth's civilization. Survivors of the catastrophe escaped, however, and hid on various planets.
- The wizard Zkauba is native to Yaddith.