Amram ben Sheshna

Amram Gaon (Hebrew: עמרם גאון, or Amram bar Sheshna, עמרם בר ששנא, or sometimes Amram ben Sheshna or Amram b. Sheshna; died 875) was a gaon or head of the Academy of Sura in Jewish Babylonia in the ninth century.

He authored many responsa, but his chief work was liturgical. He was the first to arrange a complete liturgy for the synagogue. His prayer book (Siddur Rav Amram or Seder Rav Amram), which took the form of a long responsum to the Jews of al-Andalus, is still extant and was an important influence on most of the current rites in use among Jews.