Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
BRUCE
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Nor. Fr. Local) De Bruys; from Bruy or Bruys, a place in Normandy where the family originated. De Bruys was one of the followers of William the Conqueror, and fought at the battle of Hastings. From this ancestor, King Robert Bruce was descended.
Patronymica Britannica (1860)
BRUCE. I always conjectured that the Bruces of Scotland were of a common stock with the great baronial house of Braose of Bramber, in Sussex, Gower, in AVales, &c. A passage in Drummond's British Families seems conclusiveon this point: — "Nathaniel Johnstone, M.D., wrote a history of the family of Bruce ; he affirms the identitj' of the Bruces and Braoses. The assertion is supported by many probaliilities.
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: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic