Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
OLIVER
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
From the Latin Oliva, an olive-tree, an emblem of peace.
Patronymica Britannica (1860)
OLIVER. Both as a baptismal name and a surname, was probably imported from France, where it was long associated witii romantic literature. The Domesdaj' of Devonshire presents us with a tenant called Oliver, in the modern orthography.
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