Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
TUDOR
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
The Welsh for Theodore, or in old English, pious, as Tudor Belin, the pious king.
Patronymica Britannica (1860)
TUDOR. The Welsh form of Theodore. The surname of an English dynasty, descended from Edmund Tudor, a Welsh gentleman of ancient blood. In the Domesday of Shropshire we have, as subtenant of Roger, Earl of Shrewsbury, " Tuder, quidam Walensis " — a certain Welshman called Tudor.
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: Celtic
Region of origin: British Isles
Country of origin: Wales
Religion of origin: Christian
Language of origin: Welsh