Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
KIRWAN
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
The name was O'Quirivane until the time of Queen Elizabeth, when they, with many Irish houses, were compelled to drop the "O," and Quirivane was corrupted into Kirwan.
Origin: Celtic
Region of origin: British Isles
Country of origin: Ireland
Religion of origin: Christian
Language of origin: Gaelic