Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
DENMAN
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
A denizen; in Welsh, Dinman, the place of a fortress, from din, a fortress, and man, a place. Denman, Saxon, the man of the valley; a dweller in the vale.
Patronymica Britannica (1860)
DENMAN. See the termination, den and 31AN. The form in H.R. is Ate Dene. A dweller in a dene or ' den' would be called a Denman or a Denyer. The writer of the article on Surnames in Ediub. Rev. April, 1855, thinks the original Denman ■was a swineherd.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: Occupational name
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English