Judah ben Nathan, also referred to by the Hebrew acronym RiVaN, was a gifted French rabbi and commentator on the Talmud in the eleventh to twelfth century, best known for being the son-in-law and pupil of the great commentator Rashi, and to a great extent his continuator.
He is also known to have written independent commentaries on Eruvin, Shabbat, Yevamot,[2] and Pesahim.
He also contributed some of the first tosafot (additions) to Rashi's Talmud commentary, pulling out certain points in greater detail.
It is generally considered that Judah b. Nathan wrote tosafot to several treatises of the Talmud, and he is mentioned as a tosafist in Haggahot Mordekhai (Sanhedrin, No.
Their son Yom Tov later moved to Paris and headed a yeshiva there, along with his brothers Shimson and Eliezer;[4] their daughter, Alvina, was a learned woman whose customs served as the basis for later halakhic decisions.