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