German rabbi and folklorist; born at Zabrze, Prussian Silesia, Oct. 10, 1871; educated at the gymnasium of Gleiwitz and (1889) at the university in Breslau, where he also attended the lectures of the Jewish theological seminary. In 1895 he accepted the rabbinate of the Hamburg Neue Dammthor Synagogue, where he remained until 1903, when he became rabbi of the Fifteenth District of Vienna. Since Jan., 1898, he has been editor of the "Mittheilungen der Gesellschaft für Jüdische Volkskunde," which society was founded by him in 1897 and of which he is president (1903). He was also one of the principal founders of the Hamburg Jewish Museum.
In addition to a large number of essays on general literature, folk-lore, and Jewish history, which appeared chiefly in the "Mittheilungen," Grunwald wrote the following: "Das Verhältnis Malebranche's zu Spinoza," Breslau, 1892; "Die Eigennamen des Alten Testamentes in Ihrer Bedeutung für die Kenntnis des Hebräischen Volksglaubens," ib. 1895; "Spinoza in Deutschland," Berlin, 1897; "Portugiesengräber auf Deutscher Erde," Hamburg, 1902; "Juden als Rheder und Seefahrer," Berlin, 1902; "Hamburger Deutsche Juden bis zur Auflösung der Dreigemeinden in 1811," Hamburg, 1903; "Die Moderne Frauenbewegung und das Judenthum," Vienna, 1903.