Epithet
Descriptive term used in place of a formal name
An epithet (from Ancient Greek ἐπίθετον (epítheton) 'adjective', from ἐπίθετος (epíthetos) 'additional'), also a byname, is a descriptive term (word or phrase) commonly accompanying or occurring in place of the name of a real or fictitious person, place, or thing. It is usually literally descriptive, as in Alfred the Great, Suleiman the...