Úgaine Mór ("the great"), son of Eochu Buadach, son of
Dui Ladrach, was, according to medieval Irish legend and historical tradition, a
High King of Ireland. He was the foster-son of
Cimbáeth and
Macha Mong Ruad, and took power by killing his predecessor, and his foster-mother's killer,
Rechtaid Rígderg. The
Lebor Gabála Érenn says that, as well as Ireland, he ruled "Alba to the Sea of Wight" – i.e. the whole of the island of
Britain – and that "some say" he ruled all of Europe. He married Cessair Chrothach, daughter of the king of the
Franks, who bore him twenty-two sons and three daughters. He is said to have divided Ireland into twenty-five shares, one for each of his children, which stood for three hundred years, until the establishment of the provinces under
Eochu Feidlech. He ruled for thirty or forty years, until he was killed by his brother
Bodbchad. According to the
Lebor Gabála he was succeeded directly by his son
Lóegaire Lorc, although the
Annals of the Four Masters and
Geoffrey Keating's
Foras Feasa ar Éirinn say Bodbchad was king for a day and a half until Lóegaire killed him. The
Lebor Gabála synchronises his reign to that of
Ptolemy II Philadelphus (281-246 BC). The chronology of Keating's
Foras Feasa ar Éirinn dates his reign to 441-411 BC, the
Annals of the Four Masters to 634-594 BC.
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