Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
GUNSON
As described in historical dictionaries
Patronymica Britannica (1860)
GUNSON. The son of Gun. 82c Guiin. Sackford Gunson, Esq., was one of the commissioners for Surrey, inlGlO. Brayley's Surrey, i. GS.