{ Ep"o*nym, Ep"o*nyme } (?), n. [Cf. F. éponyme. See Eponymous.] 1. 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.

2. A name, as of a people, country, and the like, derived from that of an individual.

• A person whose name has become identified with a particular object or activity.
  
• (usage conflict) A word formed from a person's name, e.g. stentorian after the Greek herald Stentor.
  
• The hero of a book, film etc. having the character's name as its title, e.g. Robinson Crusoe.
  
• (healthcare) A condition, disease or disorder named after a particular clinician or patient, e.g. Alzheimer's Disease, named after the neurologist Alois Alzheimer.