group of related languages whose speech communities are associated with a range of hills in eastern Sudan (Sudan, The) (jebel is an Arabic word meaning “hill”). The Eastern Jebel languages, which include Gaam (Ingassana or Tabi), Aka (Sillok), Kelo (Tornasi), and Molo (Malkan), are a subdivision of the Eastern Sudanic (Eastern Sudanic languages) branch of the Nilo-Saharan languages.