noun. The branch of science which relates to the rules to be observed in the formation of names or terms.

noun. The distinctive vocabulary used in any particular branch of study.

noun. A discourse or treatise on names, or the history of the names of persons.

noun. The science of names or of their classification.

noun. The study of the origins of names; onomastics.

"The interesting and extensive field of personal onomatology -- the study of personal names -- cannot be entered upon exhaustively here."