Aed Brosc was of the tribe of the Déssi who hailed from the County Waterford region of Ireland. His grandfather, Eochaid Allmuir (from Over the Sea) had left his homeland when a bid for independence by his people was severely crushed by their High-King. There is some evidence to suggest the Roman authorities asked for his help in keeping Irish pirates away from the Dyfed coast. The descendants of Aed’s eldest son, Urb, eventually founded the Kingdom of Brycheiniog, while his younger son, Triffyn Farfog, married the heiress of the Dyfed Kings. Like most Irish Royalty, Eochaid claimed descent from Beli Mawr, the Celtic Sun-God, through his son, Miled. The Sons of Miled were the first Celts to come to Ireland, driving the Old Gods into the Otherworld and founding the Milesian dynasty of Irish Kings.