Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
HALLETT
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
Little Hal, or Henry, the diminutive termination ett being added, as Willett, Ellett.
Patronymica Britannica (1860)
HALLETT. L A- Sax. Mletta, one wlio is hailed or greeted — a hero, nn eminent man. 2. A diminutive of Hal or Henry.
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