Aaron Ben Asher of Karlin (June 6, 1802-June 23, 1872), known as Rabbi Aaron II of Karlin, was one of the most famous rabbis of the Ḥasidim in northwestern Russia. He had an immense number of followers, and many thousands of them used to visit him annually, about the time of the Jewish New Year, as is the custom among that sect. Notwithstanding his severity of manner and the not infrequent rudeness of his behavior, he was highly esteemed by his adherents. He "reigned" in Karlin, near Pinsk, in the government of Minsk (currently in Belarus), in succession to his father and his grandfather, Aaron ben Jacob.