\E*pon"y*mous\, a. [Gr. ?; 'epi` upon, to + ? for ?
name.]
Relating to an eponym; giving one's name to a tribe, people,
country, and the like.

      What becomes . . . of the Herakleid genealogy of the
      Spartan kings, when it is admitted that eponymous
      persons are to be canceled as fictions?  --Grote.