alias

1 a descriptive or familiar name given instead of or in addition to the one belonging to an individual a dressmaker whom everyone knows as “Bet,” her adopted alias in the dressmaking business that she named after Betsy Ross Synonyms nickname, byname, cognomen, 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 fictitious or assumed name the English author Eric Blair, better known under the alias of George Orwell Synonyms pseudonym, nom de guerreRelated Words nom de plume, pen name; appellation, designation; misnomer; epithet, nickname, sobriquet (also soubriquet)