Owain
- Bowen (surname)
- Common Brittonic
- England and Wales
- Fire Emblem Awakening
- Julius Pokorny
- Kenneth H. Jackson
- Middle Welsh
- Old Irish
- Old Welsh
- Owain Arthur
- Owain Cyfeiliog
- Owain Danwyn
- Owain Doull
- Owain Foel
- Owain Fychan
- Owain Glyndwr
- Owain Glyndŵr
- Owain Goch ap Gruffydd
- Owain Gwynedd
- Owain Hopkins
- Owain Jones (disambiguation)
- Owain Lawgoch
- Owain Owain
- Owain Williams (disambiguation)
- Owain Wyn Evans
- Owain Yeoman
- Owain ap Dafydd
- Owain ap Dyfnwal (died 1015)
- Owain ap Dyfnwal (fl. 934)
- Owain ap Hywel (Glywysing)
- Owain ap Hywel Dda
- Owain mab Urien
- Owen (name)
- Owen Tudor
- Owen de la Pole
- Panchiko
- Patronymic
- Sir Ywain
- Welsh Language Society
- Welsh folklore
- Ywain