OG
Owain Gwynedd
d. 1170
Vitals
Died
1170
Family
Children
About
Owain Gwynedd ruled Gwynedd for thirty-three years, defied Henry the Second, and was the first Welsh ruler to style himself Prince of Wales; he died excommunicate for his marriage and was buried in Bangor cathedral by clergy who ignored the ban.
Research notes
✓ OWAIN GWYNEDD (c.1100-1170), King of GWYNEDD, first to be styled PRINCE OF WALES; father of Iorwerth Drwyndwn (our line; Iorwerth's mother Gwladus ferch Llywarch, note-only). Source: the standard Gwynedd royal genealogy (Bartrum/Dictionary of Welsh Biography), web-confirmed 6 Aug 2026; these are the documented medieval Welsh king-lists, generally accepted by historians; contested rungs note-only, not hardened.