MONASSIR (Monasir), an African tribe of Semitic stock, living in the Nile valley (Berber mudiria) between Birti (their headquarters) and Dar Robatab. They are a prosperous, sedentary tribe, claim kinship with the Ababda, and speak Arabic, but are of very mixed blood. Next to Birti their chief settlement is at Salamat. Both places are on the left bank of the Nile. It was by Monassir tribesmen that Colonel J. D. H. Stewart, Gordon's comrade at Khartum, was murdered in 1884.