Owain Glyndŵr (Welsh pronunciation: [ˈoʊain ɡlɨ̞nˈduːr]; c. 1359 – c. 1415), or Owain Glyn Dŵr, was a Welsh ruler and the last native Welshman to hold the title Prince of Wales (Tywysog Cymru). He instigated a fierce and long-running but ultimately unsuccessful revolt against the English rule of Wales.