Sir Ywain (also called Owain, Yvain, Ewain or Uwain) is a Knight of the Round Table and the son of King Urien in Arthurian legend. The historical Owain mab Urien, on whom the literary character is based, was the king of Rheged in Great Britain during the late 6th century. Ywain was one of the earliest characters associated with King Arthur, being mentioned in Geoffrey of Monmouth's Historia Regum Britanniae. He was also one of the most popular, starring in Chrétien de Troyes' Yvain, the Knight of the Lion and appearing prominently in many later accounts.
