NN ferch Rhys Ieuanc ap Rhys Mechyll Parents Rhys Fychan ap Rhys Mechyll ap Rhys Grûg ap Lord Rhys of Dinefwr, aka Rhys Ieuanc Gwladus ferch Gruffudd ap Llywelyn Children Siblings Margred (2) ferch Rhys Ieuanc ap Rhys Mechyll ap Rhys Gryg Ithel Fychan, lord of Mostyn Margaret ferch Rhys Ieunac