Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
HALSEY
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Local) From Hals, and ey or ig, Saxon, an island, water, the sea; the neck on the water, or running into the sea. The island neck.
Patronymica Britannica (1860)
HALSEY. The founder of this family was William Hawse alias Chamber, to whom Henry VIII. granted the rectory and patronage of Great Gaddesdcn, co. Hertford, where, under the name of Halsey, the family have ever since resided. B.L.G.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: Location or geographical feature
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English