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R. Isaac b. Judah ha-Levi, French exegete and tosafist; lived at Sens, probably, in the second half of the thirteenth century. He was the pupil of R. Hayyim of Falaise. The authorities quoted by R. Isaac are Joseph Kara, R. Joseph Bekor Shor, R. Judah he-Hasid, R. Eleazar of Worms, R. Hayyim of Falaise, and many other tosafists. The "Pa'aneah Raza" was first published at Prague in 1607, from an incomplete manuscript, by R. Isaac Cohen, the son-in-law of R. Jacob Mölin. Complete copies of the work, with a postscript, and a poem containing the name of the compiler in acrostic, are extant in manuscript in the Bodleian and other European libraries. R. Isaac wrote tosafot to the Talmud, and is called "Ba'al Tosafot mi-Shans" (The Tosafist of Sens).
הסכמות רבני אמשטרדם: ר' יעקב ששפורטש, ה כסלו תנ"ח; ר' משה יהודא ב"ר קלונימוס הכהן, א של ראש-חודש כסלו תנ"ח.