Owain ab Edwin of Tegeingl

Owain ab Edwin of Tegeingl or Owain the Traitor , (died 1105) was lord of the cantref of Tegeingl in north-east Wales at the end of the 11th century. He was the son of Edwin ap Gronw of Tegeingl, a great-great-grandson of Hywel Dda. He sided with the Normans in their failed invasion of North Wales, and in the 1090s attempted to become ruler of Gwynedd.

His arms were gules three men's legs conjoined at the thighs in triangle argent. His paternal grandmother is believed to have been Ethelfleda or Aldgyth, daughter of Eadwine of Mercia, brother of Leofwine. Owain's father, Edwin, appears to have been raised to the lordship of Tegeingl by Gruffydd ap Llywelyn, Links to previous rulers through the female line were very important in establishing a claim, and Owain's relationship with Bleddyn ap Cynfyn through his mother would have been relevant. Owain ap Edwin transferred his allegiance to the Normans following the defeat of his ally Trahaearn ap Caradog, prince of Gwynedd (1075–1081), at the Battle of Mynydd Carn in 1081, a move which earned him the epithet Fradwr, traitor, among the Welsh. forcing Gruffydd ap Cynan, prince of Gwynedd (1081–1137), to retreat to Anglesey. As a result of the intervention of a Norwegian army under Magnus Barelegs, the Normans suffered a defeat and withdrew most of their forces to England. He died shortly afterwards in 1105, apparently of consumption. Prince of the Welsh) and Cadwaladr ap Gruffydd.

His sons were Goronwy, Meilir, Llywelyn, Aldud, and Rhirid. Goronwy was the father of the Cristin who was the second wife of Owain Gwynedd. However, in 1125 a son of Gruffudd ap Cynan killed all Owain's male heirs bringing the direct line of the family to an end.