In the beginning of the 4th century, three warlike princes, called the Three Collas, sons of Eochy Doimhlein, son of Cairbre Lifeachar, legendary High King of Ireland, of the race of Eremon, made a conquest of a great part of Ulster, which they wrested from the old possessors, princes of the race of Ir, called the Clanna Rory, or Rudericians.
Mac Shamhráin, Ailbhe, and Paul Byrne, "Kings named in Baile Chuinn Chétchathaig and the Airgíalla Charter Poem", in Edel Bhreathnach (ed.), The Kingship and Landscape of Tara.
Ailbhe Mac Shamhráin and Paul Byrne, "Prosopography I: Kings named in Baile Chuinn Chétchathaig and the Airgíalla Charter Poem", in Edel Bhreathnach (ed.), The Kingship and Landscape of Tara.