Jastrow, Marcus (Mordechai) (1829–1903)

Polish-born US rabbi and scholar. He went to the USA in 1866 as rabbi of the Rodeph Shalom congregation in Philadelphia. In 1867, in support of Conservative Judaism, he helped found and then taught at Maimonides College. A productive scholar, his greatest accomplishment was his enormous dictionary of Jewish literature 1886–1903.

Born in Posen and educated in Germany, he was active in the Polish revolutionary cause, for which he was imprisoned and then exiled by the Russians.