Owain Glyndŵr were leaving their studies to join Owain, and Welsh labourers and craftsmen were abandoning their employers in England and returning to Wales. Owain could also draw on Welsh troops seasoned by the English campaigns in France and Scotland. Hundreds of Welsh archers and experienced men-at-arms left English service to join the rebellion. In 1404, Owain held court at Harlech and appointed Gruffydd Young as his Chancellor. Soon afterwards, he called his first Parliament (or or "gathering") of all Wales at Machynlleth, where he was crowned Prince of Wales and announced his national programme. He declared his vision of an independent
Owain ab Edwin of Tegeingl Angharad, married Gruffudd ap Cynan, Prince of Gwynedd, by whom she had three sons: Cadwallon, Owain Gwynedd (the first Welsh prince to take the title "Princeps Wallensium", 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. Owain ab Edwin of Tegeingl Owain ab Edwin of Tegeingl or Owain Fradwr (Welsh: "the Traitor"; ?