Definition of eponyms:
(n) :
A person who gave or supposedly gave their name to a people, place, institution, etc.
(n) :
Something that is named after a person.
(n) :
(loosely, sometimes proscribed) A name or term derived from any proper noun, inclusive of places, brands, etc.
(n) :
(sometimes proscribed) A name taken from a person, a namesake toponym, term, etc.
(n) :
(archaic) Synonym of epitome, a person taken as a symbol or quintessential representative of some trait, school, etc.
(n) :
(archaic) Synonym of epithet, a distinguishing title.