Eponymous

[Sarah]

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 asfictions Grote.

[Sarah]

A snobbish way to say self-titled

[Luis Fok]

An eponymous character in a play, book, etc. has the same name as the title.

[Little_Girl]

(of a person) giving their name to something.