Owain is a name of Welsh origin, and may refer several people:
Owain mab Urien (d. circa 595) was the son of Urien, king of Rheged c. 590 AD, and fought with his father against the Angles of Bernicia. He is remembered as Sir Ywain in Arthurian legend
Owain Gwynedd (c. 1100 ? November 28, 1170), alternatively known by the patronymic "Owain ap Gruffydd", is considered to be the most successful of all the north Welsh princes prior to his grandson, Llywelyn the Great
Owain Cyfeiliog (c. 1130 - 1197) was a prince of part of Powys and a notable poet.
Owain Goch ap Gruffydd (in English, "Owain the Red") (died c. 1280), was a brother of Llywelyn the Last of Gwynedd
Owain Owain, one of the founders of The Welsh Language Society; poet, writer, philosopher
Owain Lawgoch (in English "Owain of the Red Hand", full name Owain ap Thomas ap Rhodri) (c.1330 - 1378) was a great-nephew of Llywelyn the Last and claimant to the throne of Wales
Owain Glynd?r, sometimes anglicised as Owen Glendower (1359?c. 1416), was the last Welshman to hold the title Prince of Wales, and was a descendant of the princes of Powys
Owain Ddantgwyn, Prince of North Wales, proposed as a possible candidate for the "real" King Arthur