(Gronw's Stone).

Ardudwy is later associated with the ninth-century chieftain Collwyn ap Tango, the progenitor of the fifth of the Fifteen Noble Tribes of Gwynedd. He was Lord of Ardudwy and is a maternal ancestor of the Anwyl of Tywyn Family. Ardudwy was a core part of the Kingdom of Gwynedd above the River Conwy throughout