Nathan Najar was rabbi at Constantine, Algeria, in the 15th century, son of Maimun Najar, and a contemporary of Solomon ben Simon Duran. The latter addressed to him a letter, which, together with Najar's answer, is found in Israel Akrish's Ḳobeẓ Wikkuḥim, and is reprinted, with corrections and index of passages, in Kerem Ḥemed, ix. 110 et seq.