Gwen married Einion "Yrth" AP CUNEDDA King of Gwynedd, son of Cunedda "Wledig" AP EDEYRN Founder of the Gwynedd line of kings and Gwawl FERCH COEL of Rheged. (Einion "Yrth" AP CUNEDDA King of Gwynedd was born in 417 in North Wales and died about 500.)
