onomatologist
/ˌɑnəˈmætələdʒɪst/
noun
- A person who studies the history and origin of proper names.
- As an onomatologist, she helped the museum identify the origins of the artifacts' labels.
- The local onomatologist gave a talk about how street names in the city have changed over time.
- The onomatologist traced the name of the river back to an ancient Celtic word.