Énna Derg, son of Dui Finn, 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 ...

, who took power after killing his predecessor, and his father's killer, Muiredach Bolgrach. 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 pla ...

. 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 that of Artaxerxes I of Persia (465–424 BC). The chronology of Geoffrey Keating'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'' () 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 893–881 BC.''

'
M4306-4307
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References

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