Polish rabbi; born at Pinczow about 1773; died at Warsaw 1833. He was a thorough Talmudic scholar, and was also well versed in the Cabala. Holding first the rabbinate of Plock and then that of Prague, he later settled at Warsaw, where he died. The author of "Shem ha-Gedolim he-Ḥadash" narrates that Aryeh Loeb promised on his deathbed to be a good advocate in heaven for those who should publish his writings, and that this promise was engraved upon his tombstone. The rabbi was the author of many works, most of which are still in manuscript, only the following two having been published: "Ya'alat Ḥen" (Prague, 1793), responsa; and "Ṭib Giṭṭin" (Warsaw, 1812), discussions on the "Geṭ Meḳushshar" of R. M. Bala. The "Ṭib Giṭṭin" was written when the author was eighteen years of age, and its decisions have been accepted in many places.