allonymous

From allonym +‎ -ous (suffix forming adjectives).

allonymous (not comparable)

1. Misattributed: appearing or (especially) knowingly published under the name of a different person from the true author.

   allonymous authorship

   allonymous pseudonym

• misattributed, apocryphal

• “allonymous”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.