Rabbi at Alt-Ofen at the beginning of the nineteenth century; son of Mordecai b. Abraham Benet (Marcus Benedict). Jacob was the author of "Toledot Mordekai Benet" (Alt-Ofen, 1832). The first part contains a biography, and the second various writings of his father: "Liḳḳuṭim," explanations of Biblical passages; homiletic explanation of "dayyenu" as it occurs fifteen times in the Pesaḥ Haggadah; sermon on Shabbat Teshubah, delivered in 1826; commentary on the song of Deborah; "Ḥiddushe Halakot." The biography is written in a pure and easy Hebrew style.