Cadwallon ap Cynan ab Owain Gwynedd Parents Cynan ab Owain Gwynedd Children Siblings Gwenllian ferch Cynan ab Owain Gwynedd Gwerful Goch ferch Cynan ab Owain Gwynedd Maredudd ap Cynan ab Owain Gwynedd Gruffudd ap Cynan ab Owain Gwynedd