Krelibas was the homeworld of the Kreliban. It was located in the Mutter's Spiral. (AUDIO: The First Sontarans)
At one point in history, the Kreliban people were well known as a highly military species in the galaxy, until the planet was taken by the Rutan Host as part of the Rutan Empire, and its people oppressed. (AUDIO: The First Sontarans)