infamous

You might be confusing the word infamous with unfamous. These words are commonly misused.

in- + famous or infamy + -ous

• enPR: ĭnʹfə-məs, IPA ^(key): /ˈɪnfəməs/

• Audio (US)

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• Hyphenation: in‧fa‧mous

1. Someone or something that is infamous is well-known, but for bad reasons. They are famous, but are hated and considered to be bad.
   • Synonym: notorious

Infamous is the opposite of famous, but only in the sense that they express opposite opinions. For an opposite of famous that means someone/something that isn't very well-known, you should use words like obscure, overlooked, little-known, etc.