Sobairce, son of Ebric and a great great grandson of Míl Espáine, was, according to medieval Irish legend and historical tradition, joint High King of Ireland with his brother Cermna Finn. The pair came to power after Cermna killed the previous incumbent, Eochaid Étgudach, in battle at Tara. They were the first High Kings to come from the Ulaid. They divided the country between them, the border running from Drogheda to Limerick. Sobairce ruled the northern half from Dún Sobairce (Dunseverick in County Antrim), Cermna the southern half from Dún Cermna (which Keating identifies as Downmacpatrick
Sobairce, son of Ebric and a great great grandson of Míl Espáine, was, according to medieval Irish legend and historical tradition, joint High King of Ireland with his brother Cermna Finn. The pair came to power after Cermna killed the previous incumbent, Eochaid Étgudach, in battle at Tara. They were the first High Kings to come from the Ulaid. They divided the country between them, the border running from Drogheda to Limerick. Sobairce ruled the northern half from Dún Sobairce (Dunseverick in County Antrim), Cermna the southern half from Dún Cermna (which Keating identifies as Downmacpatrick in Kinsale, County Cork). They ruled for forty years. Sobairce died at the hands of Eochaid Menn, son of the king of the Fomorians. Cermna was killed in the same year by Eochaid Faebar Glas, son of the previous High King Conmáel, in the battle of Dún Cermna. The Lebor Gabála Érenn synchronises their reign with those of Laosthenes in Assyria and Rehoboam in Judah. The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates their reign to 1155–1115 BC, that of the Annals of the Four Masters to 1533–1493 BC.
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