'Eponymy' definitions:

Definition of 'eponymy'

(from WordNet)
noun
The derivation of a general name from that of a famous person

Definition of 'Eponymy'

From: GCIDE
  • Eponymy \E*pon"y*my\, n. [Gr. ? a surname given after some person or thing.] The derivation of the name of a race, tribe, etc., from that of a fabulous hero, progenitor, etc. [1913 Webster]