IPA: //ʌnˈfeɪməs//
KK: /ʌnˈfeɪməs/
Not well-known or recognized by many people.
The artist remained unfamous despite her talent.
Unfamous is formed from "un-" (meaning not) and "famous" (from Latin "famosus", meaning renowned or celebrated). The word "unfamous" means not renowned or not celebrated.
Think of 'un-' meaning not, and 'famous' meaning renowned — so unfamous describes someone who is not renowned.