Crimthann Nia Náir (nephew of Nár), son of Lugaid Riab nDerg, was, according to medieval Irish legend and historical tradition, a High King of Ireland.
[2] Geoffrey Keating[3] and the Annals of the Four Masters[4] agree that Crimthann succeeded Conchobar as High King and ruled for sixteen years.
He is said to have gone on a voyage with his aunt Nár, a fairy woman, for a month and a fortnight, and returned with treasures including a gilded chariot, a golden fidchell board, a gold-embroidered cloak, a sword inlaid with gold serpents, a silver-embossed shield, a spear and a sling which never missed their mark, and two greyhounds with a silver chain between them.
Keating says he was succeeded by his son Feradach Finnfechtnach, the Annals of the Four Masters by Cairbre Cinnchait.
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