pseudonymously
Adverb
Meaning
(computing, law) Pertaining to pseudonymization.
Under a pseudonym.
Source: en.wiktionary.orgSynonyms
Examples
Sapir initially wrote to Benedict to commend her for her dissertation on "The Guardian Spirit", but soon realized that Benedict had published poetry pseudonymously.
These were mostly printed anonymously (or occasionally pseudonymously) and were quickly forgotten.