The Greek origin of pseudonym (and even of its parts) is pretty obvious: Greek pseudṓnymos “under a false name, falsely called” is a compound whose first element pseudo- “false, lying” is a combining form of pseûdos “a lie.” The second element -ṓnymos is a combining form deriving from the noun ónoma (Doric and Aeolic ónyma ) “name.”
The English noun appeared in the early 1800s, but the adjective pseudonymous was recorded more than a century earlier, in Edward Phillips’s 1706 dictionary New World of Words.
Examples from the Web for pseudonym
Random House agreed that all future editions of the book will state that “Barry” was a pseudonym.
I used to run a blog in Arabic called “Nour Alakl” and ran a satirical Facebook page under the pseudonym “Allah.”
Her nervousness about its content made her decide to publish it under a pseudonym, for reasons that would later become clear.
A person claiming to be a TRN employee published a release on PR Newswire under the pseudonym ‘Mary Donovan’.
Julio Cesar Rosas (a pseudonym) owns a medium-sized business in Los Cortijos, a district in east-central Caracas.Who Will Maduro Blame for Venezuela’s Blackout This Time?|Daniel Lansberg-Rodríguez|June 28, 2014|DAILY BEAST
Pharais was the first of the books written and published under the pseudonym of Fiona Macleod.William Sharp (Fiona Macleod)|Elizabeth A. Sharp
This should be the real name of the person, not a nom de plume or pseudonym.
Hoinix (pseudonym for the same indefatigable Mr. Henderson), 1889—Anglo-franca.International Language|Walter J. Clark
He is better known to the outer world under the pseudonym "Johann Orth."The Gnomes of the Saline Mountains|Anna Goldmark Gross
Both real name and pseudonym may be put on the back, but it does not seem necessary.Library Bookbinding|Arthur Low Bailey
British Dictionary definitions for pseudonym
Word Origin for pseudonym
Word Origin and History for pseudonym
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).