You searched for: “cognominal
cognominal (adjective) (not comparable)
A reference to the name that is used for family members as a group and separate from each person's given or first name: "In ancient Rome, a third name or nickname; such as, Caesar in Gaius Julius Caesar but now indicates a surname or one's family name."
This entry is located in the following unit: nom-, nomen-, nomin-, -nomia, -nomic (page 1)