Ateker, or ŋaTekerin, is a common name for the closely related Jie, Karamojong, Turkana, Toposa, Nyangatom and Teso peoples and their languages. These ethnic groups inhabit an area across Uganda and Kenya. "Itung'a" (a vernacular term meaning "people of one language") and "Teso" have been used among ethnographers, while the term Teso-Turkana is sometimes used for the languages, which are of Eastern Nilotic stock. "Ateker" means 'clan' or 'tribe' in the Teso language. In the Lango language, the word for clan is "atekere".