• (n.) A cognomen or surname.
Cog·nom`i·na'tion noun [ Latin cognominatio .] A cognomen or surname. [ R.] Jer. Taylor. 
cognomen, cognomination 1. In Roman usage: the third name, family name, or surname of a Roman citizen; such as, Marcus Tullius Cicero, Caius Julius Caesar. 2. An additional name or epithet bestowed on individuals, as Africanus, Cunctator (in later Latin called agnomen). 3. A surname or family name. 4. A nickname or name that describes someone, e.g....