Iorwerth ap Madog ap Gruffudd (est. 1225 - ) Parents Madog ap Gruffudd Children Dafydd ab Iorwerth ap Madog ap Gruffudd Madog ab Iorwerth ap Madog ap Gruffudd Siblings Y Teg Fadog, ap Madog ap Gruffudd ab Owain Brogyntyn