Dafydd ab Owain may refer to:
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Dafydd ab Owain Gwynedd
Dafydd ab Owain Gwynedd ( – 1203) was Prince of Gwynedd from 1170 to 1195. For a time he ruled jointly with his brothers Maelgwn ab Owain Gwynedd and Rhodri ab Owain Gwynedd.
Dafydd was the son of Owain Gwynedd by Cristin ferch Goronwy ab ...
(c. 1145–1203), Prince of Gwynedd
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Dafydd ab Owain (bishop), bishop of St Asaph, 1503–1512
{{hndis, Owain, Dafydd ab