ZENAGA (SANHAJA, SENAJER)  , a Berber tribe of southern Morocco who gave their name to Senegal, once their tribal home . They formed one of the tribes which, uniting under the leadership of Yusef bin Tashfin, crossed the Sahara and gave a dynasty to Morocco and Spain, namely, that of the Almoravides (q.v.) . The Zeirid dynasty which supplanted the Fatimites in the Maghrib and founded the city of Algiers was also of Zenaga origin . The Zenaga dialect of Berber is spoken in southern Morocco and on the banks of the lower Senegal, largely by the negro population .