Rhys Fychan ap Rhys Mechyll ap Rhys Grûg ap Lord Rhys of Dinefwr, aka Rhys Ieuanc - 17 Aug 1271 Dinefwr Parents Matilda de Braose Rhys Mechyll Children Ithel Fychan, lord of Mostyn Margred (2) ferch Rhys Ieuanc ap Rhys Mechyll ap Rhys Gryg Margaret ferch Rhys Ieunac NN ferch Rhys Ieuanc ap Rhys Mechyll Siblings Gwenthlian Mechyll Rhys Fychan