IPA: /ˌɒnəˈmætələdʒɪst/
KK: /ˌɑːnəˈmætələdʒɪst/
A person who studies the history and origin of names.
The onomatologist explained the significance of family names in different cultures.
Onomatologist → It is formed from "onoma" (from Greek, meaning name) and "-logist" (from Greek "logia", meaning study or science). An onomatologist is someone who studies names or naming conventions.
Think of 'onoma' meaning 'name' and '-logist' meaning 'study' — an onomatologist is someone who studies names.