Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
SON
As described in historical dictionaries
Patronymica Britannica (1860)
B OMGAR SON. According toGent. Mag., Oct. 1S20, this is the Germ, haum-gai-tm, tree-garden, orchard. The Fr. hon-gargoii is a far likelier etymon. Ferguson thinks it a patronymic of " A-Sax. hongar, a fatal spear," Init there is no proof of such a name having existed.