Source : Webster's Revised Unabridged Dictionary (1913)

Eponymous \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.

Source : WordNet®

eponymous
     adj : being or relating to or bearing the name of an eponym [syn:
           {eponymic}]