Cathassach mac Lurgain
Cathassach mac Lurgain was a Dal nAraide king of the Cruithne in Ulaid. He was the son of Fiachnae mac Báetáin a king of all Ulaid and possible high king and brother of Eochaid Iarlaithe mac Lurgain, a King of the Dal nAraide. He ruled from 666 to 668.
He belonged to the main ruling dynasty of the Dal nAraide known as the Uí Chóelbad based in Mag Line, east of Antrim town in modern county Antrim. In the 6th and 7th centuries the Dal nAraide were part of a confederation of Cruithne tribes in Ulaid and were the dominant members.
In 668 he clashed with the Ulaid at that time ruled by Blathmac mac Máele Cobo and was slain at the battle of Fertas.
