Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
HART
As described in historical dictionaries
Patronymica Britannica (1860)
HART. A male deer — a common charge of lieraldrj'. Its medieval form as a surname is ' Le Hart.' We have a large importation of Harts from Germany, where the word imilies hard, stiif, inflexible, rude, or severe. Manj' Jewish families hear this name.
Surname type: Nickname
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English