[2] The earliest report of him in the Irish annals is his flight from the battlefield at the Battle of Claenath (Clane, Co. Kildare) in 704 following the defeat of a number of southern Uí Néill kings by Cellach Cualann (died 715), King of Leinster.
[5] He caused some manner of disturbance in 717 at the Oenach Tailtiu—an annual Uí Néill gathering held at Teltown—where "Ruba's son and Dub Sléibe's son" were killed, but the annalistic record lacks sufficient context to explain what happened there and why.
[8] Fergal mac Máele Dúin undertook campaigns against Leinster in revenge, but was killed by the Leinstermen on one of these, at the battle of Allen, on 11 December 722.
[10] Fogartach replaced Fergal as High King, but himself fell victim to the war within the Síl nÁedo Sláine, being killed in the battle of Cenn Deilgden by his distant kinsman and successor Cináed mac Írgalaig of the Uí Chonaing sept of North Brega.
His sons included: His descendants representing the main line of the Uí Chernaig sept based at Lagore were in rivalry with his uncle Conall Grant's descendants, the Síl Conaill Graint based at Calatruim for the rule of southern Brega.