"The Tubu or Toubou (Old Tebu: \"Rock People;\" also written Tibu, Tibbu, Tebu, Tubu, Tebou, Umbararo) are Berber people that live mainly in northern Chad, but also in southern Libya, northeastern Niger and northwestern Sudan."@en . . . "Toubou people"@en . . . . . . "350000"^^ .