Austrian rabbi; lived at Wiener-Neustadt in the second half of the fourteenth century. He was distinguished for Talmudic learning, and was the first to receive the title "Morenu." Like his colleagues Meïr ha-Levi and Abraham Klausner, rabbis at Vienna, he devoted himself to recording the religious customs ("minhagim") of the Jewish communities. His collection is contained in the "Minhagim" of his pupil Jacob Mölln. Another of his disciples, Isaac Tyrnau of Hungary, also made a compilation of minhagim.