Eochaid Iarlaithe mac Lurgain (died 666) [1] was a Dal nAraide king of the Cruithne in Ulaid (Ulster).
In the 6th and 7th centuries the Dal nAraide were part of a confederation of Cruithne tribes in Ulaid (Ulster) and were the dominant members.
[3] The chronology of the Kings of Dál nAraidi is difficult to ascertain between the Battle of Mag Roth in 637 and the plague of 666.
Eochaid's young daughter was married to the older Rónán Crach mac Áedo of the Uí Máil in Leinster, however she fell in love with her stepson Máel Fothartaig and attempted to seduce him.
[5] Eochaid's son Lethlobar mac Echach (died 709) was also a king of Dal nAraide.