eponym: Meaning and Definition of

ep•o•nym

1. a person, real or imaginary, from whom something, as a tribe, nation, or place, takes or is said to take its name: Brut, the supposed grandson of Aeneas, is the eponym of the Britons.
2. any ancient official whose name was used to designate his year of office.
3. a word based on or derived from a person's name.