Antonomasia

Antonomasia. It is the result of interaction between logical and nominal meaning of a word.
1) When the proper name of a person, who is famous for some reasons, is put for a person having the same feature.
e.g. Her husband is an Othello.
2) A common noun is used instead of a proper name, e. g. I agree with you Mr. Logic, e.g. My Dear Simplicity.