Toubou people

The Tubu or Toubou (Old Tebu: "Rock People;" also written Tibu, Tibbu, Tebu, Tubu, Tebou, Umbararo) are Nilotic people that live mainly in northern Chad, but also in southern Libya, northeastern Niger and northwestern Sudan. They speak Tebu, in the Saharan subfamily of the Nilo-Saharan languages language family.