Jacob ben Aaron

Jacob ben Aaron of Karlin (died 1855 at Karlin, government of Minsk) was a Russian rabbi and author. He was a grandson of Baruch of Shklov, the mathematician and author, and was one of the earliest and most renowned graduates of the Volozhin yeshiva. He held the office of rabbi at Karlin for about thirty years, and was considered one of the greatest rabbinical authorities of his time.
Jacob was the author of: (1) "Mishkenot Ya'aḳob" (Wilna, 1838), responsa on the four parts of the Shulchan Aruch; (2) "Ḳohelet Ya'aḳob" (ib. 1857), novellæ on the tractates of the Talmudic orders Zeraim and Moed; and (3) another collection of responsa.

• Fuenn, Keneset Yisrael, p. 574