Eponym

An eponym is the name of a person, whether real or fictitious, after which a particular place, tribe, era, discovery, or other item is named or thought to be named. One who is referred to as eponymous is someone who gives his or her name to something, e.g. Julian, the eponymous owner of the famous restaurant Julian's Castle. Something eponymous is named after a particular person, e.g. Julian's eponymous restaurant.

In contemporary English, the term eponymous is often used to mean self-titled^[1]. E.g., the song "Black Sabbath", from the album Black Sabbath, by the band Black Sabbath

Example of eponymous: Marilyn Manson which was formed from juxtaposing the names of two 1960's American cultural icons, namely, actress Marilyn Monroe and convicted multiple murder mastermind^[3]Charles Manson as a critical and, simultaneously, laudatory appraisal of America and its peculiar culture.

Source: http://en.wikipedia.org/wiki/Eponym