Dui Dallta Dedad ("foster-son of

Deda mac Sin Deda mac Sin (Deda, son of Sen) was a prehistoric king of the Érainn of Ireland, possibly of the 1st century BC. Variant forms or spellings include Ded, Dedu, Dedad, Degad, Dega, Dego, Deguth and Daig, with some of these occurring as genitives ...

"), son of Cairpre Lusc, son of

Lugaid Luaigne Lugaid Luaigne, son of Finnat Már, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He came to power after killing his predecessor, and his father's killer, Bresal Bó-Díbad, and ruled for five or fift ...

, 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 took power after killing his predecessor, and his grandfather's killer,

Congal Cláiringnech Congal Cláiringnech ("the cripple"), son of Rudraige, was, according to medieval Irish legend and historical tradition, a king of Ulster and High King of Ireland. He was the brother of Bresal Bó-Díbad, the former High King, who had been killed ...

, and ruled for ten years, at the end of which he was killed by

Fachtna Fáthach Fachtna Fáthach ("the wise"), son of Cas (or Ross), son of Rudraige, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He came to power when he defeated the previous High King, Dui Dallta Dedad, in the ba ...

in the battle of Árd Brestine. 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

Ptolemy XII Auletes Ptolemy XII Neos Dionysus Philopator Philadelphus ( grc-gre, Πτολεμαῖος Νέος Διόνυσος Φιλοπάτωρ Φιλάδελφος, Ptolemaios Neos Dionysos Philopatōr Philadelphos; – 51 BC) was a pharaoh of the Ptolemaic ...

(80–51 BC) in

Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Mediter ...

and the

civil war A civil war or intrastate war is a war between organized groups within the same state (or country). The aim of one side may be to take control of the country or a region, to achieve independence for a region, or to change government policies ...

between

Pompey Gnaeus Pompeius Magnus (; 29 September 106 BC – 28 September 48 BC), known in English as Pompey or Pompey the Great, was a leading Roman general and statesman. He played a significant role in the transformation of ...

and

Caesar Gaius Julius Caesar (; ; 12 July 100 BC – 15 March 44 BC), was a Roman people, Roman general and statesman. A member of the First Triumvirate, Caesar led the Roman armies in the Gallic Wars before defeating his political rival Pompey in Caes ...

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

(49 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 a ...

's ''Foras Feasa ar Éirinn'' dates his reign to 120–110 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 169–159 BC.''

'
M5031-5041
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References

Legendary High Kings of Ireland 2nd-century BC legendary rulers Regicides Usurpers Monarchs killed in action {{Ireland-royal-stub