The Kanuri people (Kanouri, Kanowri, also Yerwa, Baribari and several subgroup names) are an African ethnic group living largely in the lands of the former Kanem and Bornu Empires in Niger, Nigeria, Sudan, Libya and Cameroon. Those generally termed Kanuri include several subgroups and dialect groups, some of whom identify as distinct from the Kanuri. Most trace their origins to ruling lineages of the medieval Kanem-Bornu Empire, and its client states or provinces. In contrast to the neighboring Toubou or Zaghawa pastoralists, Kanuri groups have traditionally been sedentary, engaging in farming, fishing the Chad Basin, trade, and salt processing. Kanuri peoples include several subgroups, and identify by different names in some regions. The Kanuri language was the major language of the Bornu Empire and remains a major language in southeastern Niger, northeastern Nigeria and northern Cameroon, but in Chad it is limited to a handful of speakers in urban centers. The largest population of Kanuri reside in the northeast corner of Nigeria, where the ceremonial Emirate of Bornu traces direct descent from the Kanem-Bornu empire, founded sometime before 1000 CE. Some 3 million Kanuri speakers live in Nigeria, not including some 200,000 speakers of the Manga dialect. The Nga people in Bauchi State trace their origins to a Kanuri diaspora. In southeastern Niger, where they form the majority of the sedentary population, the Kanuri are commonly called Baribari (a Hausa name). The 400,000 Kanuri population in Niger includes the Manga subgroup, numbering some 100,000 (1997) in the area east of Zinder, who regard themselves as distinct from the Baribari. Around 40,000 (1998) members of the Tumari subgroup, sometimes called Kanembu, are a distinct Kanuri subgroup living in the N'guigmi area, and are distinct from the Chadian Kanembu people. In the Kaour escarpment oasis of eastern Niger, the Kanuri are further divided into the Bilma subgroup, numbering some 20,000 (2003), and are the dominant ethnic group in the salt evaporation and trade industry of Bilma.