Owain Glyndŵr (Welsh pronunciation:
Glyndŵr was a descendant of the Princes of Powys from his father Gruffydd Fychan II, hereditary Tywysog of Powys Fadog and Lord of Glyndyfrdwy, and of those of Deheubarth through his mother Elen ferch Tomas ap Llywelyn. On 16 September 1400, Glyndŵr instigated the Welsh Revolt against the rule of Henry IV [...]