Main Entry: ep·onym

Pronunciation: \ˈe-pə-ˌnim\

Function: noun

Etymology: Greek epōnymos, from epōnymos eponymous, from epi- + onyma name — more at name

Date: 1846

1 : one for whom or which something is or is believed to be named
2 : a name (as of a drug or a disease) based on or derived from an eponym

— ep·onym·ic \ˌe-pə-ˈni-mik\ adjective