Eochaid mac Art Corp (The Expulsion of the Déisi)

Dyfed is the Welsh word for South West Wales, which is where I live.

Oxford Dictionary of Celtic Mythology: Eochaid Top Home > Library > Religion & Spirituality > Celtic Mythology 1. Pre-Christian sun-god of the ancient Irish, horseman of the heavens, and god of lightning; his sword is a lightning bolt. He is usually described as one-eyed, and sometimes carries the epithet Deirgderc [Irish, red eye], which is also borne by the Dagda. This epithet may link him with Lough Derg on the Shannon. Euhemerizing medieval historians created Eochaid mac Luchta from him and confused him with Eochaid Ollathair (another name for the Dagda). 2. King of Dún Sobairche [Dunseverick] who betrothed his daughter to Rónán(1), a king of Leinster. The story of the daughter's thwarted adultery with Rónán's son Máel Fothartaig and the subsequent havoc is told in Fingal Rónáin [How Rónán Slew His Son]. In revenge, Donn(2), Máel Fothartaig's foster-brother, murdered Eochaid, his wife, and son.

Read more: http://www.answers.com/topic/eochaid-2#ixzz2WIT0SoqW

Eochaid claimed descent from Beli Mawr, the Celtic Sun-God, through his son, Miled

"Waterford is Ireland's oldest city and was founded by the Vikings in the 9th century."

https://en.wikipedia.org/wiki/History_of_Waterford

"The Kingdom of Dyfed is one of several Welsh petty kingdoms that emerged in 5th-century post-Roman Britain in south-west Wales, based on the former Irish tribal lands of the Déisi from c 350."

https://en.wikipedia.org/wiki/Kingdom_of_Dyfed

Prince/leader of the Deisi, an Irish tribe, whose chiefs/kings represented the senior-line of the Milesians of Meath-Connacht, during a period of civil wars in Ireland, led the Deisi from Ireland to South-West Wales where they were settled in Pembrokeshire by the Roman authorities of Britain. His descendants later inherited the Welsh kingdom of Dyfed [Demetia], through its heiress.