AMRAM (died 875), a famous gaon or head of the Jewish Academy of Sura (Persia) in the 9th century. He was author of many "Responsa," but his chief work was liturgical. He was the first to arrange a complete liturgy for the synagogue, and his Prayer Book (Siddur Rab `Amram) was the foundation of most of the extant rites in use among the Jews. The Siddur was pub lished in Warsaw in two parts (1865).