Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
We don't have any stats on how common this name is. This is probably because it's very rare in the UK.
Region of origin
Country of origin
Language of origin
Religion of origin
Related and similar surnamesCotter
The Cotman surname in historical dictionaries
Patronymica Britannica (1860)
COTMAN. The cotmannus, i.e., the cottarius, cotter, or cottager, of Domesd. was one who held by free socage tenure, and paid rent in provisions or money. Ellis, Introd. Domesd. In H.R. Cotman is used as a baptismal name.