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