Eochu (or Eochaid), son of

Ailill Finn Ailill Finn, son of Art mac Lugdach, was, according to medieval Irish legend and historical tradition, a High King of Ireland. In the ''Lebor Gabála Érenn'', he succeeded to the throne when his father was killed by Fíachu Tolgrach and his s ...

, was, according to medieval Irish legend and historical tradition, a

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 ...

. He succeeded to the throne after his father was killed by

Airgetmar Airgetmar, son of Sirlám, was, according to medieval Irish legend and historical tradition, a High King of Ireland. The ''Lebor Gabála Érenn'' says that, during the reign of Ailill Finn, he killed Fíachu Tolgrach in battle, but was forced int ...

and his ally

Dui Ladrach Dui Ladrach, son of Fíachu Tolgrach, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He helped his father kill the High King Art mac Lugdach, then helped Airgetmar take the throne by killing Art's son A ...

. 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 was himself killed by Airgetmar and Dui.

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 a ...

says he ruled for seven years, resisted Airgetmar and made peace with Dui, who killed him treacherously at a meeting, allowing Airgetmar to take the kingship. The ''Lebor Gabála'' synchronises his reign with that of

Artaxerxes II of Persia Arses ( grc-gre, Ἄρσης; 445 – 359/8 BC), known by his regnal name Artaxerxes II ( peo, 𐎠𐎼𐎫𐎧𐏁𐏂 ; grc-gre, Ἀρταξέρξης), was King of Kings of the Achaemenid Empire from 405/4 BC to 358 BC. He was the son and suc ...

(404–358 BC). The chronology of Keating's ''Foras Feasa ar Éirinn'' dates his reign to 577–570 BC, that of 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 Irish history. The entries span from the Deluge, dated as 2,24 ...

'' to 785–778 BC.''

'
M4415-4422
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References

Legendary High Kings of Ireland {{Ireland-royal-stub