A warrior.
Son of Nut, and brother of Yder the son of Nut, Gwynn and Dryon.
Note
Owain is the original form of Yvain, found in Welsh legends and belonging to the historical character of that name.
I’ve chosen to call Owain/Yvain, son of Urien of Rheged and Morgan le Fay by the name Ywaine.