Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
WALSH
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
A Gaul, which the Germans pronounce with a "w," as Wallic for Gaulic. Wallis, Wallish, Walsh. The Welsh were originally from Gaul. (See Wales and Wallace.)
Patronymica Britannica (1860)
WALSH. WALSHE. A native of Wales.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English