Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
MULTON
As described in historical dictionaries
Patronymica Britannica (1860)
MULTON. The founder of this fnnily resided temp. Henry I. at Multon, co. Lincoln, and from (hence derived his name. From him sprang the two baronial houses of this title.