Irish mythology Irish mythology is the body of myths native to the island of Ireland. It was originally passed down orally in the prehistoric era, being part of ancient Celtic religion. Many myths were later written down in the early medieval era by C ...

Fiacha Cennfinnán (modern spelling: Fiacha Ceannfhionnán meaning "Fiacha f thelittle white head"), son of Starn, son of Rudraige, of the

Fir Bolg In medieval Irish myth, the Fir Bolg (also spelt Firbolg and Fir Bholg) are the fourth group of people to settle in Ireland. They are descended from the Muintir Nemid, an earlier group who abandoned Ireland and went to different parts of Europe. ...

, became

High King of Ireland High King of Ireland ( ga, Ardrí na hÉireann ) 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 later sometimes assigned ana ...

when he overthrew his great-uncle Sengann. He ruled for five years, until he was overthrown by

Rinnal In Irish mythology, Rinnal (Rindal, Rionnal, Rinnan) son of Genann of the Fir Bolg became High King of Ireland when he overthrew Fiacha Cennfinnán. He is said to have been the first king in Ireland to use spearheads (cf. Old Irish ''rind, rinn'' ...

, son of

Genann Genann Mac Dala (modern spelling: Geanann), son of Dela (Dela was a descendant of Starn, son of Nemed), of the Fir Bolg was a legendary joint High King of Ireland with his brother Gann, succeeding their brother Rudraige. His wife was Cnucha. W ...

. The Milesian king

Fíachu Findoilches Fíachu Findoilches, son of Fínnachta, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He succeeded to the throne on the death of his uncle Géde Ollgothach, whom, according to some versions, he had kill ...

is sometimes known by the same name.

Primary sources

* ''

Lebor Gabála Érenn ''Lebor Gabála Érenn'' (literally "The Book of the Taking of Ireland"), known in English as ''The Book of Invasions'', is a collection of poems and prose narratives in the Irish language intended to be a history of Ireland and the Irish fro ...

'' *

Annals of the Four Masters The ''Annals of the Kingdom of Ireland'' ( ga, Annála Ríoghachta Éireann) or the ''Annals of the Four Masters'' (''Annála na gCeithre Máistrí'') are chronicles of medieval Irish history. The entries span from the Deluge, dated as 2,24 ...

Seathrún Céitinn Geoffrey Keating ( ga, Seathrún Céitinn; c. 1569 – c. 1644) was a 17th-century historian. He was born in County Tipperary, Ireland, and is buried in Tubrid Graveyard in the parish of Ballylooby-Duhill. He became an Irish Catholic priest and a ...

's ''Foras Feasa ar Érinn'' {{DEFAULTSORT:Fiacha Cennfinnan Legendary High Kings of Ireland Fir Bolg