Definitions for "Eponym"
The hypothetical individual who is assumed as the person from whom any race, city, etc., took its name; as, Hellen is an eponym of the Hellenes.
A name, as of a people, country, and the like, derived from that of an individual.
Name of a person or group of persons after or for whom a place is named. Examples: Iago (James) in Santiago; Everest in Mount Everest; M_sa (Moses) in W_d_ M_sa. The corresponding term in French is ethnonym.