IPA: /ˌɒnəˈmæstɪk/
KK: /ɑˈnɑːmæstɪk/
This word describes something that is connected to the study of names or naming.
The onomastic research revealed the origins of many common surnames.
Onomastic → It is formed from "onoma" (ὄνομα) (meaning name) in Greek and the suffix "-ic" (meaning pertaining to). The word "onomastic" refers to anything related to names, particularly the study of names and their origins.
Think of the Greek word for name, 'onoma', to remember that 'onomastic' relates to the study of names.