the name of two Jewish theologians. (1) Jacob (1630-1695), rabbi (Hakham) of the Spanish Jews in London from 1680. Like his brother Isaac, Jacob Abendana had a circle of Christian friends, and his reputation led to the appreciation of Jewish scholarship by modern Christian theologians. (2) Isaac (c. 1650-1710), his brother, taught Hebrew at Cambridge and afterwards at Oxford. He compiled a Jewish Calendar and wrote Discourses on the Ecclesiastical and Civil Polity of the Jews (1706).