Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
ERWIN
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Welsh) Erwyn, very fair, white. Urfionn, Gaelic, beautiful, fair.
Origin: Celtic
Region of origin: British Isles
Country of origin: Ireland
Religion of origin: Christian
Language of origin: Gaelic