Antonomasia; an instance of this.
Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. From classical Latin prōnōminātiōn-, prōnōminātiō antonomasia from prō- + nōmināt-, past participial stem of nōmināre + -iō, after Hellenistic Greek ἀντονομασία.
Indication of or reference to something by means of a pronoun.
Late 19th century; earliest use found in Notes and Queries. From classical Latin prōnōmin-, prōnōmen pronoun + -ation.