Fíachu Labhrainne, son of Smirgoll, son of Enboth, son of Tigernmas, was, according to medieval Irish legend and historical tradition, a

High King of Ireland High King of Ireland ( ) was a royal title in Gaelic Ireland held by those who had, or who are claimed to have had, lordship over all of Ireland. The title was held by historical kings and was later sometimes assigned anachronously or to leg ...

. He came to power by killing the previous incumbent, Eochaid Faebar Glas, in the battle of Carman, in vengeance for his father, who had been killed by Eochaid in the battle of Druimm Liatháin. He was named after the river Labrainn, which burst from the ground during his reign. He fought a sea battle against the descendants of Éber Finn, and fought a battle against the

Érainn The Iverni (, ') were a people of early Ireland first mentioned in Ptolemy's 2nd century ''Geography'' as living in the extreme south-west of the island. He also locates a "city" called Ivernis (, ') in their territory, and observes that this se ...

at Mag Genainn in

County Fermanagh County Fermanagh ( ; ) is one of the thirty-two counties of Ireland, one of the nine counties of Ulster and one of six counties of Northern Ireland. The county covers an area of and had a population of 63,585 as of 2021. Enniskillen is the ...

, which resulted in Loch Erne bursting from the ground. In another battle he killed Eochaid's son Mofebis. Mofebis's son Eochu Mumu killed him in vengeance in the battle of Sliab Belgatain.

Geoffrey Keating Geoffrey Keating (; – ) was an Irish historian. He was born in County Tipperary, Ireland, and is buried in Tubrid Graveyard in the parish of Ballylooby-Duhill. He became a Catholic priest and a poet. Biography It was generally believed unt ...

adds that during his reign, his son Aengus Olmucada conquered

Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...

. The ''

Lebor Gabála Érenn ''Lebor Gabála Érenn'' (literally "The Book of Ireland's Taking"; Modern Irish spelling: ''Leabhar Gabhála Éireann'', known in English as ''The Book of Invasions'') is a collection of poems and prose narratives in the Irish language inten ...

'' synchronises his reign with those of Piritiades and Ofratalus in

Assyria Assyria (Neo-Assyrian cuneiform: , ''māt Aššur'') was a major ancient Mesopotamian civilization that existed as a city-state from the 21st century BC to the 14th century BC and eventually expanded into an empire from the 14th century BC t ...

. The chronology of Keating's ''Foras Feasa ar Éirinn'' dates his reign to 1095–1071 BC, that of the ''

Annals of the Four Masters The ''Annals of the Kingdom of Ireland'' () or the ''Annals of the Four Masters'' () are chronicles of Middle Ages, medieval Irish history. The entries span from the Genesis flood narrative, Deluge, dated as 2,242 Anno Mundi, years after crea ...

'' to 1473–1449 BC.''

'
M3727-3751
/ref>

References

Legendary High Kings of Ireland {{Celt-myth-stub