Énna Airgdech ('rich in silver',Dictionary of the Irish Language, Compact Edition, Royal Irish Academy, 1990, p. 26 also spelled Airgthech, Airgtheach), son of Eochu Mumu, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He came to power after killing the previous incumbent and his father's killer, Óengus Olmucaid, in the battle of Carman. He is said to have made silver shields for his nobles in Argatros. He reigned for twenty-seven or twenty-eight years, before being killed by Óengus' grandson Rothechtaid mac Main in the battle of Raigne.R. A. Stewart Macalister (ed. & trans.), Lebor Gabála Érenn: The Book of the Taking of Ireland Part V, Irish Texts Society, 1956, pp. 229 The chronology of Geoffrey Keating's Foras Feasa ar Éirinn dates his reign to 1032–1005 BC,Geoffrey Keating, Foras Feasa ar Éirinn 1.26 that of the Annals of the Four Masters to 1537–1533 BC.Annals of the Four Masters M3790-3817
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