רב נטרונאי גאון

Natronai ben Hilai was Gaon "head rabbi" of the Sura Academy of Rabbinic Judaism in Lower Mesopotamia from 857 until 865. He held this post for ten years. He is responsible for more written responsa to queries posed to him by world Jewry than any of his predecessors, and maintained close contact with the Jews of al-Andalus.