Regina Jonas ([ʀeˈɡiːna ˈjoːnas]; German: Regine Jonas; 3 August 1902 – 12 October/12 December 1944) was a Berlin-born rabbi. In 1935, she became the first woman to be ordained as a rabbi. There had been some women before Jonas who made significant contributions to Jewish thought, such as the Maiden of Ludmir, Asenath Barzani, and Lily Montagu, who acted in similar roles without being ordained.