Saadia ben Joseph

Saadia ben Joseph (882–952), known as Saadia Gaon, leading figure in medieval Judaism. He was head of the Academy at Sura, Babylonia, and orthodox champion against the ascetic Karaites. He wrote a Hebrew grammar and lexicon, an Arabic translation of the Bible, created the siddur, or prayer book, and the Book of Beliefs and Opinions (933).

See also: Judaism.