Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
DONALD
As described in historical dictionaries
Patronymica Britannica (1860)
DONALD. A well-known northern personal name, whence Donalds, Mac Donald, Donaldson, Donnison, Donkin. Gaelic etymologists derive the name from " Donhm,"i.e., "brown-eyed."
Surname type: From given name or forename
Origin: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic