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 ...

, Fiacha (, sometimes Fiachu, Fiachra or Fiachna), son of Delbáeth, of the

Tuatha Dé Danann The Tuath(a) Dé Danann (, meaning "the folk of the goddess Danu (Irish goddess), Danu"), also known by the earlier name Tuath Dé ("tribe of the gods"), are a supernatural race in Irish mythology. Many of them are thought to represent deity, ...

, was a legendary High King of Ireland. According to the ''

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 ...

'', he took the throne after his father was overthrown by Caicher son of Nama, brother of Nechtan.''

'
§63
/ref> The ''

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 In the history of Europe, the Middle Ages or mediev ...

'' and

Geoffrey Keating 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 ...

say he overthrew his father himself. His mother was Ernmas. He had three daughters,

Banba In Irish mythology, Banba (modern spelling: Banbha ), daughter of Delbáeth and Ernmas of the Tuatha Dé Danann, is a matron goddess of Ireland. She was married to Mac Cuill, a grandson of the Dagda. She was part of an important triumvirat ...

Fódla In Irish mythology, Fódla or Fótla (modern spelling: Fódhla, Fodhla or Fóla), daughter of Delbáeth and Ernmas of the Tuatha Dé Danann, was one of the tutelary giantesses of Ireland. Her husband was Mac Cecht. With her sisters, Banba and ...

, and

Ériu In Irish mythology, Ériu (; modern ga, Éire ), daughter of Delbáeth and Ernmas of the Tuatha Dé Danann, was the eponymous matron goddess of Ireland. The English name for Ireland comes from the name Ériu and the Germanic (Old Norse or ...

, by his own mother.''

'
§64
/ref> He reigned for ten years, before he and his nephew Aoi Mac Ollamain were killed in battle against Éogan of Imber.

References

Tuatha Dé Danann Legendary High Kings of Ireland {{celt-myth-stub