Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun cognomen

2 senses of cognomen

Sense 1
nickname, moniker, cognomen, sobriquet, soubriquet, byname -- (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")
       => appellation, denomination, designation, appellative -- (identifying word or words by which someone or something is called and classified or distinguished from others)

Sense 2
surname, family name, cognomen, last name -- (the name used to identify the members of a family (as distinguished from each member's given name))
       => name -- (a language unit by which a person or thing is known; "his name really is George Washington"; "those are two names for the same thing")