What is "sinharib"

'''Sinharib ''' or Sanharib, , according to the Hagiography of Mar Behnam was an Assyrian king of Nineveh in the fourth century AD. Much like Julian the Apostate of the Roman Empire, Sanharib disliked Christianity and tried to persuade his son Behnam to reject Christianity. Although greatly influenced by the Persian Zoroastrian religion at first, he later became Christian.