Margred ferch Llywelyn Ddû ap Gruffudd ab Iorwerth Foel Parents Margred ferch Madog Fychan ap Madog ap Rhirid Llewelyn 'Ddu' ap Gruffudd Children Siblings Maredudd ap Llywelyn Ddû ap Gruffudd of Maelor Saesneg Annes ferch Llywelyn Ddu ap Gruffudd ab Iorwerth Foel Angharad ferch Llywelyn