Mathghamhain [SEP] date of death
Mathghamhain
Mathghamhain (also spelled "Mathgamain" or "Mathúin" and anglicised Mahon) was an Irishman of the early 11th century. He was the son of Cian mac Máelmuaid and his wife Sadhbh, who was daughter of the High King Brian Boru. Through Cian, Mathghamhain was a member of the Eóganacht Raithlind, a dynastic line claiming descent from Eoghan Mor, a 2nd-century King of Munster. Mathghamhain (whose name means "bear-calf") was killed at the Battle of Clontarf in 1014.
in the Battle of Kilmore, County Cavan. His brother Mathghamhain and many other McKiernans were also killed in the battle. Some of the annals give a later date for Conchobar's death.
The Annals of Ulster for 1314 state-
"Conchobur Mag Tighernain 'the Tawny', chief of Tellach-Dunchadha, was slain in the defeat of Cell-mor and Mathgamain Mag Tighernain and the Red Gillie, son of the Herenagh and many more of his tribe and Nicholas Mac in Maighistir and many of his sept were slain