Welsh origin, and may refer to:

Owain mab Urien (d. circa 595), 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 ? 1170), aka "Owain ap Gruffydd", considered most successful of all the north Welsh princes prior to his grandson, Llywelyn the Great

Owain Cyfeiliog (c. 1130 - 1197), prince of part of Powys and a notable poet

Owain Goch ap Gruffydd (in English, "Owain the Red") (died c. 1280), 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), great-nephew of Llywelyn the Last and claimant to the throne of Wales

Owain Glynd?r, sometimes anglicised as Owen Glendower (1359?c. 1416), last Welshman to hold the title Prince of Wales, and descendant of the princes of Powys

Owain Ddantgwyn, Prince of North Wales, proposed as possible candidate for the "real" King Arthur

Owain of Strathclyde (disambiguation), the name of several kings of Strathclyde

Owain Yeoman, Welsh actor, currently Starring on The Mentalist

Owen (anglicised form of the name)