Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
DUFFUS
As described in historical dictionaries
Patronymica Britannica (1860)
DUFFUS. A parish on the coast of jMorayshire, Scotland. The name may, hoAvever, be a corruption of Dovehouse, like Bacchus from Backhouse, or Maithus from Malthouse. In support of the latter derivation, avc may cite the de Duffus, del Dulfus, Duflius, Columbiers, and de Columbariis of the H.R. Residence near one of the great monastic or manorial pigeonhoiises of the middle ages would readily confer such a surname.
Origin: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic