The scene is a mother and young son standing on o high promontory near Dublin in Ireland. The mother points towards a mountainous country on the horizon. 'That's Gwynedd,' she tells her son. 'That's the kingdom of Cynan, your father. He had to flee and leave - but one day you will return and become King of Gwynedd.'

Dychmygwch yr olygfa: Mam a'i mab ifanc yn sefyll ar bentir uchel ger Dulyn yn Iwerddon ac mae hi'n pwyntio at wlad fynyddig ar y gorwel. 'Dacw Wynedd,' meddai wrth ei mab. 'Dyna deyrnas Cynan, dy dad. Bu'n rhaid iddo ffoi a gadael – ond rhyw ddiwrnod byddi di'n dychwelyd yno a thi fydd Brenin Gwynedd.'