MADDOCK

(origin: Welsh.) The same as Madoc, a proper name common among the Welsh, from mad, good, and the termination oc or og, the same as the termination y or ous in English. The terminations c and ac, denote fixedness, force, plenitude. Og, in its simple form, signifies animation, activity; also, possessing that which precedes it; oc, greatness, grandeur; ox, quickness, promptitude.

Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.

MADDOCK. MADDOX. Madoc an ancient Welsh personal name. One Madochwas a tenant in chief in Herefordshire at the making of Domesday. He was doubtless a Welshman by birth.

Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.