Feradach Finnfechtnach (modern spelling: Fearadhach Fionnfeachtnach - "fair-blessed"),[1] son of Crimthann Nia Náir, was, according to medieval Irish legend and historical tradition, a High King of Ireland.
The Lebor Gabála Érenn[2] and the Annals of the Four Masters[3] agree that he came to power after the death of Cairbre Cinnchait.
Geoffrey Keating[5] has Feradach succeed his father Crimthann, placing Cairbre's reign later.
Keating relates that the judge Morann mac Máin (who in the Lebor Gabála and the Annals is the son of Cairbre and his wife Mani) lived in Feradach's time.
Feradach ruled for twenty years according to the Lebor Gabála and Keating, twenty-two according to the Annals, before dying a natural death at Liathdroim, an ancient name for the Hill of Tara.