Hywel ap Cadel, perhaps more commonly known as Hywel Dda (Hywel “the Good”), was originally the Welsh King of Deheubarth before coming to rule over most of Cymru, including Gwynedd, in his lifetime. Hywel Dda was a skilled politician who succeeded in usurping the Kingdom of Gwynedd from Idwal Foel and his children, Iago and…