cognomen

n 1: a familiar name (often a shortened version of a person's

given name); "Joe's mother would not use his nickname

and always called him Joseph" [syn: {nickname}, {moniker},

{sobriquet}, {soubriquet}]

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}]