Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
CORNELIUS
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
From the Latin cornu, a horn (Greek, ??); and ??, the sun--the horn of the sun.
Patronymica Britannica (1860)
CORNELIUS. The personal name.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Region of origin: Europe
Country of origin: Netherlands
Language of origin: Dutch