cognomen

1 a descriptive or familiar name given instead of or in addition to the one belonging to an individual richly deserved the cognomen of “Butterfingers” Synonyms alias, byname, nickname, epithet, handle, moniker (also monicker), sobriquet (also soubriquet), surnameRelated Words appellation, denomination, denotation, designation, label, tag, title; anonym, nom de guerre, nom de plume, pen name, pseudonym

2 a word or combination of words by which a person or thing is regularly known “Christopher Columbus” is the Latinized cognomen of the navigator who was known to his Spanish crewmates as Cristóbal Colón Synonyms appellation, appellative, name, compellation, denomination, denotation, designation, handle, moniker (also monicker), nomenclature, titleRelated Words baptismal name, Christian name, first name, forename, given name; family name, maiden name, middle name, surname; matronymic, patronymic; byname, diminutive, epithet, hypocorism, nickname, sobriquet (also soubriquet); banner, rubric, tag; alias, cryptonym, nom de guerre, nom de plume, pen name, pseudonym; binomial, monomial; trivial name, vernacular; misnomer; brand name, label, trademark, trade name