Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
HOLT
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Local) A small hanging wood, from Hultz, Dutch, a wood; a peaked hill covered with wood; a grove of trees around a house.
Patronymica Britannica (1860)
HOLT. Halliwell says a grove, or small forest. On the South Downs generally, if not always, it is a small hanging wood. See other definitions in Eng. Surn. i. 75.' Leo says copse or wood, corresponding with the Germ. holz. The H.R. forms are De, Dela, Del, and Le Holt. There are towns and places specifically named Holt in Norfolk, Wiltshire, Worcestershire, and Leicestershire.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English