Yaakov Lorberbaum

Jacob Lorberbaum or Jacob ben Jacob Moses of Lissa (1760-1832) , Hebrew: יעקב בן יעקב משה מליסא) was a rabbi and posek. He is most commonly known as the Ba'al HaChavas Da'as or the Ba'al HaNesivos for his most well-known works, or as the "Lissa Rav" for the city in which he was Chief Rabbi.

Biography Lorberbaum was the great-grandson of Tzvi Ashkenazi. Another legend is that at his naming ceremony, his father was preoccupied with his study and thought they asked for his name. He studied under Meshullam Egra.

He was widely respected as a posek and is one of three authorities on whom Shlomo Ganzfried based his rulings in the Kitzur Shulchan Aruch, the well-known précis of Halakha. Similarly, the Hokhmat Adam of Avraham Danzig was written in consultation with Lorberbaum and Chaim of Volozhin.

His status was such that it is reported that Eiger once fainted when he was honored with an Aliyah in place of Jacob. (See Shimusha Shel Torah, Meir Tzvi Bergman).

Lorberbaum died in Stryi, then in Galicia, on 25 May 1832. Naphtali Z. Chachamowicz after his death, comprising sermons on the Torah Portion, halachic decisions, responsa, and his last will. In this famous ethical will he asked that his sons devote time every day to learn at least one page of Gemara.

Commemoration A street in Modi'in Illit is named after his book Nesivos HaMishpat, and a street in Kfar Hassidim is named after him.