Amram ben Sheshna

Amram bar Sheshna or Amram Gaon (Jewish Babylonian Aramaic: עמרם בר ששנא or Hebrew: עמרם גאון; died 875) was a gaon or head of the Academy of Sura in Lower Mesopotamia 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 siddur (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 Rabbinic Jews.