הרב דוד בן זמרא

David ben Solomon ibn (Abi) Zimra (1479–1573)—also called the Radbaz (רַדְבָּ״ז) after the initials of his name, Rabbi David ben Zimra—was an early acharon of the fifteenth and sixteenth centuries who was a leading posek, rosh yeshiva, chief rabbi, and author of more than 3,000 responsa as well as several scholarly works.