Answer: antonomasia

AnswerCrossword Clue
antonomasiaThe substitution of an epithet or title for a proper name (e.g., the Bard for Shakespeare)
antonomasiathe substitution of a title or epithet for a proper name, as in calling a sovereign "Your Majesty"
antonomasiaThe use of a proper name to express a general idea (e.g., a Scrooge for a miser)