ROSENBAUM, MORRIS (1871–1947), English rabbi and scholar. Rosenbaum, who was born in London, received his early education in the Jewish Orphanage, London. Later he studied at Jews' College and University College, London. After doing communal work in London, Rabbi Rosenbaum became minister of the Jewish congregation of Hanley (Staffordshire), and shortly afterward of the community in Newcastle-on-Tyne. In 1905 he returned to London to become minister-secretary of the Borough Synagogue, a post he held until his retirement 30 years later. Rosenbaum's wide interests included mathematics, and he was a recognized authority on the Jewish calendar and was responsible for the authorized Jewish almanac. His labors in the field of Anglo-Jewish genealogy brought him inquiries from prominent historians. He was also active in freemasonry and held offices in the brotherhood. Rosenbaum, together with A.M. *Silbermann, translated Rashi's commentaries on the Torah into English: Pentateuch with Targum Onkelos, Haphtaroth and Prayers for Sabbath and Rashi's Commentary (5 vols., 1929–34).