The Eastern Jebel languages are a small subfamily belonging to the Eastern Sudanic subgroup of Nilo-Saharan. They are spoken in the hills of An Nil al Azraq province in eastern Sudan (the name "Jebel" is simply Arabic for "mountain".) The group consists of Gaam (also called "Ingassana" or "Tabi"), Aka (Silak), Kelo (Tornasi), and Molo (Malkan). Gaam has some 40-80,000 speakers, whereas the other three are on the verge of extinction. Gaam was believed to be the only member of this group until more information about Aka, Kelo, and Molo was obtained by Bender; the latter three languages have been significantly influenced by Berta.

Gaam is spoken in a compact area around the towns of Bau , Bobuk , Kukur , and Sawda in the Tabi Hills , roughly 11°15'-30' N by 33°55'-34°10 E. The other three are spoken in isolated pockets to its south: Aka in the Sillok Hills , Kelo in the Tornasi Hills on jebels Tornasi (Kayli village) and Beni Sheko, and Molo at Jebel Malkan near the Ethiopian border.

Bibliography

• Malik Agaar Ayre & M. Lionel Bender , Preliminary Gaam-English-Gaam Dictionary. Addis Abeba 1980.
• W. J. Crewe. "The Phonological Features of the Ingessana Language". 1975.
• E. E. Evans-Pritchard , "Ethnological Observations in Dar Fung ", Sudan Notes and Records 15.1, 1932. pp. 1-61.
• F. S. & J. Lister. "The Ingessana Language: A Preliminary Description", Journal of Ethiopian Studies 4.1, 1966. pp. 41-44. Described by Bender as "so inaccurate as to be nearly useless."
• B. Z. Seligman. "Notes on Two Languages Spoken in the Sennar Province of the Anglo-Egyptian Sudan", Zeitschrift für Kolonialsprachen 2.4, 1912. pp.297-308.
• Timothy M. Stirtz. "Phonology and Orthography in Gaahmg", in ed. Leoma C. Gilley, Occasional Papers in the Study of Sudanese Languages No. 9, Entebbe: SIL-Sudan 2004.
• Sisto Verri. "Il Linguaggio degli Ingessana nell'Africa Occidentale", Anthropos 50, 1955. pp. 282-318.