Ér, Orba, Ferón and Fergna, sons of Éber Finn

Eber Finn

Éber Finn , son of Míl Espáine, was, according to medieval Irish legend and historical tradition, a High King of Ireland and one of the founders of the Milesian lineage, to which medieval genealogists traced all the important Gaelic royal lines.According to the Lebor Gabála Érenn, the ancestors of...

, were, according to medieval Irish legends and historical traditions, joint High Kings of Ireland

High King of Ireland

The High Kings of Ireland were sometimes historical and sometimes legendary figures who had, or who are claimed to have had, lordship over the whole of Ireland. Medieval and early modern Irish literature portrays an almost unbroken sequence of High Kings, ruling from Tara over a hierarchy of...

 for half a year after they killed their cousins Luigne and Laigne

Muimne, Luigne and Laigne

Muimne, Luigne and Laigne, sons of Érimón by his wife Odba, were, according to medieval Irish legends and historical traditions, joint High Kings of Ireland following the death of their father...

, sons of Érimón, in the Battle of Árd Ladrann. They were soon killed by Érimón's son Íriel Fáid in the Battle of Cul Martha in revenge for his brothers. Geoffrey Keating

Geoffrey Keating

Seathrún Céitinn, known in English as Geoffrey Keating, was a 17th century Irish Roman Catholic priest, poet and historian. He was born in County Tipperary c. 1569, and died c. 1644...

 dates their reign to 1269 BC, the Annals of the Four Masters

Annals of the Four Masters

The Annals of the Kingdom of Ireland or the Annals of the Four Masters are a chronicle of medieval Irish history...

to 1681 BC.

The name Ferón means "blacksmith

Blacksmith

A blacksmith is a person who creates objects from wrought iron or steel by forging the metal; that is, by using tools to hammer, bend, and cut...

" or "metal worker".