Gruffydd Dwnn Peerage person ID=330808 (1407–1443) Parents Mallt ferch Gruffudd Fychan ab Ieuan ap Cadwgon Fawr Maredudd ap Henry Dwnn Children Sir John Donne Siblings Owain Dwnn Jonet ferch Maredudd ap Henry Dwnn ap Gruffudd Dwnn Mabli ap Maredudd