1) Assumed name 
other person's name used by an author
• (n.) A work published under the name of some one other than the author. • (n.) The name of another person assumed by the author of a work.
Al'lo·nym noun [ French allonyme , from Greek ... other + ... name.] 1. The name of another person assumed by the author of a work. 2. A work published under the name of some one other than the author. 
allonym 1. The name of another person, especially that of a significant historical figure, assumed by somebody, especially a writer. 2. A book bearing the name of someone other than its author.
the name of another person taken by an author as a pen name. Cf. pseudonym. · a work published under a name that is not that of the author.