Sir Ywain /ᵻˈweɪn/, also called Owain, Yvain, Ewain or Uwain, is a Knight of the Round Table and the son of King Urien and Morgan le Fay 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.