Ep"o*nym, Ep"o*nyme (?), n. [Cf. F. 'eponyme. See Eponymous.]
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.
© Webster 1913.