Walton English: habitational name from any of the numerous places called Walton. The first element in these names was variously Old English walh ‘foreigner’, ‘Briton’, genitive plural wala (see Wallace), w(e)ald ‘forest’, w(e)all ‘wall’, or wæll(a) ‘spring’, ‘stream’.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4