Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
BUCK
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
Such names as Lyon, Bull, Buck, etc., may have been borrowed from armorial bearings, the shields and banners of war, or for a resemblance to those animals noted for courage, agility, or swiftness, or from signs and emblems over shops and inns.
Patronymica Britannica (1860)
BUCK. The animal, famed in the chase, and familiar as an armorial ensign and as a trader's sign. Le Buc. H.R.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: Nickname
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English