FERGUS

(origin: Gaelic and Celtic.) A fierce or brave chieftain, from Fear, man, and guth, a voice or word, that is, the man of the word, a commander of an army. Some suppose the first Fergus was so named from Fairghe, the sea, on account of his large navy; others, from his raging like the sea in battle. Feargach, fiery.

Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.

FERGUS. FEARGUS. A Scottish saint (whence St. Fergus in Aberdeenshire) — Gaelic etymologists deduce the name from fear, a man, and cas, hardiness — energy — a man of hardj'', energetic character.

Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.