Iorwerth Ap Heilyn Ap Cyfnerth Ap Morgenau Ynad

Iorwerth's father was Heilyn Ap Cyfnerth Ap Morgenau Ynad.  His paternal grandfather was Cyfnerth Ap Morgenau Ynad Ap Gwrydyr Ap Dyfnain.  He was an only child.  Iorwerth is no longer alive.

He had a biological son named Iorwerth Vychan.