cog·no·men /kɑgˈnomən, ˈkɑgnə-/
1. The last of the three names of a person among the ancient Romans, denoting his house or family.
2. Eng. Law A surname.
n 1: a familiar name for a person (often a shortened version of
a person's given name); "Joe's mother would not use his
nickname and always called him Joseph"; "Henry's
nickname was Slim" [syn: nickname, moniker, sobriquet,
2: the name used to identify the members of a family (as
distinguished from each member's given name) [syn: surname,
family name, last name]
[also: cognomina (pl)]