eponymous

[From Greek epōnumos. See eponym.]

eponymous [ip‐on‐imŭs], name‐giving: a term applied to a real or fictitious person after whom a place, thing, institution, meal, or book is named. Thus Anna Karenina is called the eponymous heroine of Tolstoy's novel Anna Karenina. The term is often extended beyond its strict sense to describe a character who is referred to indirectly (i.e. not by name) in the title of a work: thus Michael Henchard is called the eponymous character of Hardy's The Mayor of Casterbridge. An eponym is a name transferred from a person to a place or thing, either in its original form or as adapted (e.g. Bolivar or Bolivia). See also antonomasia.

eponymous (‘that gives his name’), term used both of those who gave their names to places, as the goddess Athena to Athens, and of the chief magistrate of a city (in Athens the principal archon, in Rome the two consuls) who gave his name to the year in which he held office, thereby identifying it (see CALENDARS). When Cleisthenes (2) divided the Athenians into ten tribes, the Delphic Oracle chose ten Attic heroes to be their eponyms (epōnymoi).

The adjective has one meaning:

Meaning #1: being or relating to or bearing the name of an eponym
  Synonym: eponymic
  Pertains to noun: eponym (meaning #2)