An assumed name used by a writer instead of their real name:his early work was written under the pen name of Owen Meredith...
He supplied six more tales to the Monthly Magazine during 1834, and for the publication of the second instalment of the fifth story he signed himself by his new pen-name: ‘Boz’.
Also remember that fear of retribution usually leads those who test the boundaries of debate to adopt pen-names as the writer of this ground breaking letter surely does.
Second, most actors and playwrights remained anonymous or adopted pen-names.