Profiat Duran, full Hebrew name Isaac ben Moses ha-Levi; was a Jewish apologist/polemicist, philosopher, physician, grammarian, and controversialist in the 14th century. He was later sometimes referred to by the sobriquet Efodi (האפודי) through association with his two grammars entitled "Ephod." After being forcibly converted in 1391, he also appears in official records under his converso Christian name Honoratus de Bonafide. After escaping Spain, he returned to practicing Judaism openly, and wrote a number of works including polemics against Christianity and grammar.
