Polish rabbi; died in Posen Nov. 25, 1806. He was a descendant of R. Joshua (d. 1648), the author of "Maginne Shelomoh," and was related to the Heilprin family. At the age of twenty-three he became rabbi of Bilguria, near Zamoscz, and later held similar positions in Przeworsk and in Tarnopol, where he was living in 1795. In 1801 he succeeded his brother Joseph "ha-Ẓaddiḳ" (son-in-law of R. Ezekiel Landau of Prague) in the rabbinate of Posen, where he remained until his death. He was the author of "Bet Shemuel Aḥaron," of which the first parts contain responsa, and the last is devoted to sermons on the weekly lessons from the Pentateuch (Novidvor, 1806).