Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
CHARMAN
As described in historical dictionaries
Patronymica Britannica (1860)
CHARMAN. Probably a charcoalburner, from ' char.' It may however be the masculine of char-woman — a man who works by the day in trivial occupations. The H.R. form is Le Charrer.