IPA: /ˈælənɪm/
KK: /ˈælənɪm/
A name taken by a writer that belongs to someone else, often a historical figure.
The author used an allonym to give his work a sense of authenticity.
Allonym is formed from "allo-" (from Greek "allos", meaning other) and "onym" (from Greek "onuma", meaning name). The word refers to a name that is used by an author that is not their own, essentially an 'other name'.
Think of 'other' ('allo-') and 'name' ('onym') to remember that an allonym is a name that belongs to someone else.
No commonly confused words.