A tribe of Piets had come from Thrace by this time. According to Bede, the widows of three of the vanquished Milesian chiefs were given in marriage by Eireamhon to the leaders of these strangers. They then left for Scotland, and conquered it for Eireamhon, so that their chief, Cathluan, became the first of the seventy kings of the Cruithnigh who ruled over Scotland.

The three sons of Eireamhon reigned three years. One died, two were slain by the four sons of Eibhear, who reigned for a year until slain by Irial Faidh. His rule lasted ten years. He was defeated by the Fomoraigh at Teannmhagh in Connacht. In the course of his reign seven royal castles were built and sixteen plains cleared of wood. He died at Magh Muidhe and was buried there. Seven further plains were cleared of wood in the reign of his son Eithrial who was slain by Conmhaol. Conmhaol was buried at Aonach Macha called Conmhaol’s mound.