Pronunciation: (ep'u-nim), [key]
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.