-onymy
noun combining form
-on·y·my
ˈänəmē,
-mi
plural -es
1
: kind of name or word : kind or set of names or words
hydronymy
2
: study of a (specified) kind of names or words
anthroponymy
Word History
Etymology
Latin -onymia, from Greek -ōnymia, from -ōnymos (as in homōnymos) + -ia -y