Isaac is mentioned in the Tosafot (Yeb. 5a, 71a; Ket. 38b; Zeb. 73b; and frequently elsewhere), and Isaac ben Moses, in his "Or Zarua'," No. 739, quotes Isaac ben Jacob's commentary on Ketubot, a manuscript of which exists in the Munich Library (No. 317).
Profiat Duran (c. 1350-1415) (Hebrew name Isaac ben Moses ha-Levi), physician and philosopher
He is quoted on almost every page of the Tosafot, and in various works, especially in the Sefer ha-Terumah of his pupil Baruch ben Isaac of Worms, and in the Or Zaṙua of Isaac ben Moses.
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