Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
MCNAB
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
The son of Nab. Nab, the summit of a mountain or rock. The son of the Abbot? Nab, Persic, a chief, a prince.
Surname type: From name of parent
Origin: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic