Éber Finn (modern spelling: Éibhear Fionn), 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 the Gaels were living in the Iberian Peninsula, ruled by two of the sons of Míl, Éber Donn and Érimón.
They set sail, but the Tuatha Dé used magic to brew up a storm, in which five of the sons were drowned, leaving only Eber Finn, Érimón and Amergin the poet, to land and take the island in the Battle of Tailtiu.
Amergin divided the kingship between Érimón, who ruled the northern half, and Éber Finn, the southern.
Éber's sons included Conmáel, Ér, Orba, Ferón and Fergna.