onomastics UK /ˌɒ.nəʊˈmæs.tɪks/US /ˌɑː.noʊˈmæs.tɪks/ noun[plural only]1 •The branch of lexicology devoted to the study of names and naming, especially the origins of names.Her father had long been a student of onomastics, and loved to unpack the names of people they encountered as children. — 2024
