pseudonymyoudaoicibaDictYouDict[pseudonym 词源字典]
pseudonym: [19] Pseudonym comes via French pseudonyme from Greek pseudónumon, a compound formed from pseudés ‘false’ and ónoma ‘name’. Pseudés, a derivative of the verb pseúdein ‘lie’, has given English the prolific prefix pseudo-, which in the mid 20th century yielded the noun and adjective pseud.
=> name[pseudonym etymology, pseudonym origin, 英语词源]
pseudonym (n.)youdaoicibaDictYouDict
1828, in part a back-formation from pseudonymous, in part from German pseudonym and French pseudonyme (adj.), from Greek pseudonymos "having a false name, under a false name," from pseudes "false" (see pseudo-) + onyma, Aeolic dialectal variant of onoma "name" (see name (n.)).

"Possibly a dictionary word" at first [Barnhart]. Fowler calls it "a queer out-of-the-way term for an everyday thing." Properly in reference to made-up names; the name of an actual author or person of reputation affixed to a work he or she did not write is an allonym. An author's actual name affixed to his or her own work is an autonym (1867).