Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
ADCOCK
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
little Ad or Adam, cock being a diminutive termination. (See Alcock, Wilcox, etc.)
Patronymica Britannica (1860)
ADCOCK. A diminutive of xVdam. See termination Cock.
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