Scottish and northern Irish: Anglicized form of Scottish Gaelic
Mac an Aba(dh) ‘son of the abbot’. In Scotland, monasteries
often had hereditary lay abbots, who were not bound by rules of
celibacy. The McNabs seem to have originated at the monastery of St. Faolan in Strathfillan.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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