Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
PEACOCK
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
Taken from the name of the well-known fowl; pea, contracted from the Latin, pavo, Saxon, pawa, French, paon,--a name given from a fondness of display.
Patronymica Britannica (1860)
PEACOCK. The bird. See Pocock.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: Diminutive
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English