cognominal
/kɑɡˈnɑmɪnəl/
adjective
- Relating to a surname, family name, or nickname.
- She researched her cognominal history to learn about her ancestors.
- The cognominal tradition in Iceland uses the father's first name as a base for the child's last name.
- The author used a cognominal pen name to separate his fiction from his academic work.
- Having the same name or surname; namesake.
- The two cognominal mayors from different cities met at the conference.
- He was cognominal with his grandfather, both named John Smith.
- The cognominal twins were often confused by their teachers.