Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
There are approximately 3,684 people named Adair in the UK. That makes it the 2,752nd most common surname overall. Out of every million people in the UK, approximately 58 are named Adair.
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Related and similar surnamesAdar
The Adair surname in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
Patronymica Britannica (1860)
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.