Margred ferch Iorwerth Ddû ab Ednyfed Gam ab Iorwerth Foel Parents Angharad ferch Adda Iorwerth 'Ddu' ap Ednyfed Children Siblings Myfanwy ferch Iorwerth Ddû ab Ednyfed Gam of Llys Pengwern Adda ap Iorwerth Ddu