Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
There are approximately 7,984 people named Cornish in the UK. That makes it the 1,356th most common surname overall. Out of every million people in the UK, approximately 126 are named Cornish.
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Related and similar surnamesCorish
The Cornish 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.