Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
DEVENISH
As described in historical dictionaries
Patronymica Britannica (1860)
DEVENISH. The flimily first appear as gentry in co. Sussex about the year 1399. The name, clearly indicative of a Devonshire origin, is cognate with Kentish, Cornish, &c. The Irish branch, who transferred themselves to the sister island in tlie reign of Henry VIII., have a tradition