Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
MCFADDEN
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Celtic.) The son of Faddan. Fada, Gaelic, tall; Phaudeen, Gaelic, "little Patrick," and Mac, son; MacPhaudeen, the son of little Patrick.
Surname type: From name of parent
Origin: Celtic
Region of origin: British Isles
Country of origin: Ireland
Religion of origin: Christian
Language of origin: Gaelic