The following BWL databases and print sources list brand names:
Encyclopedia of Consumer Brands (1994) Ref./HF5415.3 .E527 A 2-volume encyclopedia of brands that have become "household words." Each entry includes brand origin, early marketing strategy, etc.
Dictionary of Trade Name Origins (1982) Ref./T324. R66 1982 A listing of brand names, with brief information about the origin of each name.