Like his contemporaries and countrymen Isaac ben Sheshet and Simon ben Ẓemaḥ Duran, he left Spain in consequence of the persecutions and fled (1395) to Algeria. In his responsa Tashbaẓ (part i., No. 86, Amsterdam, 1738) Duran calls Najar "Maimun ben David", but David Conforte, in Ḳore ha-Dorot, p. 26b, designates him as "Maimun ben Saadia." Najar's correspondence with Duran on religious questions is found in Tashbaẓ (part i., Nos. 94-96, 131-134, 154-157; part ii., Nos. 4, 68-73, 86, 89, 135, 164-168).
