Somebody and Unperson

Somebody noun - A person who is widely known and usually much talked about.

Unperson and somebody are semantically related. In some cases you can replace term "Unperson" with "Somebody", this nouns are similar.

Unperson noun - A person regarded as nonexistent and having no rights; a person whose existence is systematically ignored (especially for ideological or political reasons).

Somebody and unperson are semantically related. Sometimes you can use "Somebody" instead a noun "Unperson".