Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
MITCHELL
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
A corruption of Michael, or from the Saxon Muchel, big.
Patronymica Britannica (1860)
MITCHELL. The A-Sax. mjjcel, great, or mickle, would be a tolerably satisfactory etymon, and this may in some instances be the origin of the surname ; but I think in most cases it is derived from Michael, a very popular baptismal name in many countries, through its French form, Michel. This view is confirmed by the existence of the surname Mitchelson.
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