Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
DENDY
As described in historical dictionaries
Patronymica Britannica (1860)
DENDY. The family tradition is, that the name -svas originally D'Awuay, or Dawndy. In the sixteenth century it was written Dendye, and from that time the cliief habitat of the family has been the borders of Surrey and Sussex. In the parish register of Newdigate, co. Surrey, I have observed the spellings Dandie, Dandy, Dendj'. See Dawnay.
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English