Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
CASS
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Gaelic.) Cas, a verb, to turn against, to thwart, oppose; a difficulty, a trying situation, a cause. Cas, a castle, the primary sense is to separate, drive off, or hate; the radical sense of hatred is driving off.
Patronymica Britannica (1860)
CASS. Cas, an ancient Irish personal name, found so early as the fifth century. See Macnamara.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: From given name or forename
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English