Isaac ben Joseph of Corbeil, [587].
Isaac ben Mordecai, physician to the pope, [628].
Isaac ben Samuel of Dampierre (Ri), head of the school of Rameru and Tossafist, [403] f., [406].
Isaac, son of Abraham Ibn-Ezra, embraces Islam, [442].
Isaac the Younger (Rizba), [408].
Isaac Sanjari and Bulan, [140].
Isaacs, the five, [282] ff.
Isavites, [125].
Ishmael, founder of the Akbarite sect, [157].
Isidore of Seville, [49].
polemics of, against Judaism, [50] f.