Extract from new place name research on the Cateran Trail area, undertaken for the Caterans Common Wealth project:

This is an Anglicised Fèith nan Ceann found in Creag Feith nan Ceann KRK. The name means ‘bog of the heads’, and severed heads is a common motif in Fian literature. The name shows signs of an older form féith na gCeann containing eclipsis after the genitive plural of the definite article (Watson 1926, 242).