n. The branch of lexicology devoted to the study of names and naming, especially the origins of names.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the branch of lexicology that studies the forms and origins of proper names
Word Usage
""word meaning" as you declare, but rather "onomastics" is the study of proper names and thus, "anonymous" is not strictly a fit object of onomatology."