Énna Derg, son of Dui Finn, was, according to medieval Irish legend and historical tradition, a High King of Ireland, who took power after killing his predecessor, and his father's killer,

Muiredach Bolgrach Muiredach Bolgrach, son of Siomón Brecc, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He took power after killing his predecessor, and his father's killer, Dui Finn, ruled for 13 months or four years ...

. He was called ''derg'', red, because he had a red face. It is said that coins were first used in Ireland during his reign. He ruled for twelve years, before dying of plague in Sliab Mis, surrounded by a large number of his troops. He was succeeded by his son

Lugaid Íardonn Lugaid Íardonn, son of Énna Derg, was, according to medieval Irish legend and historical tradition, a High King of Ireland. His epithet, Old Irish for "dark brown", came from the colour of his hair. He succeeded his father, who had died of pl ...

. 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 ...

'' synchronises his reign with that of

Artaxerxes I of Persia Artaxerxes I (, peo, 𐎠𐎼𐎫𐎧𐏁𐏂𐎠 ; grc-gre, Ἀρταξέρξης) was the fifth King of Kings of the Achaemenid Empire, from 465 to December 424 BC. He was the third son of Xerxes I. He may have been the "Artasy ...

(465–424 BC). The chronology of

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 ...

's ''Foras Feasa ar Éirinn'' dates his reign to 670–658 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 In the history of Europe, the Middle Ages or mediev ...

'' to 893–881 BC.''

'
M4306-4307
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References

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