Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
BELLEW
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Nor. Fr.) De Bellew, a corruption of De Belle Eau, that is, "from the beautiful water." The family originally came from Italy; they went into England with William the Conqueror, and afterward settled in Meath, Ireland.
Origin: Celtic
Region of origin: British Isles
Country of origin: Ireland
Religion of origin: Christian
Language of origin: Gaelic