Margaret Hanmer wife of Owain Glyndŵr (1370–1420) Parents Angharad ferch Llywelyn David Hanmer Children Janet Glendower Catrin ferch Owain Glyndŵr Maredudd ab Owain Glyndŵr Gruffudd ab Owain Glyndŵr Ieuan ap Dafydd Dymock, of Penley Gwenllian ferch Owain Glyndŵr Alys ferch Owain Glyndŵr Siblings Gruffudd Hanmer Gruffudd ap Sir David Hanmer Philip Hanmer Jenkin Hanmer Partners Owain Glyndŵr