Margaret ferch Llywelyn Peerage person ID=4125 Parents Llywelyn ab Iorwerth NN Children John de Briouze William de Braose, 1st Baron Braose Matilda de Clifford Sir Richard Brewes Siblings Susanna ferch Llywelyn Tegwared y Bais Wen Gwladus Ddu Angharad ferch Llywelyn Gruffudd ap Llywelyn ab Iorwerth Elen ferch Llywelyn Dafydd ap Llywelyn Partners Walter III de Clifford John de Braose