Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
ARNOLD
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: German.) The same as Ernold; from are or ehre, honor, and hold, faithful or devoted to--faithful to his honor. How unworthy of the name was the notorious Benedict!
Patronymica Britannica (1860)
ARNOLD. The personal name; also a parish in the county of Wilts.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: From given name or forename
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English