eponymous

It's no coincidence that "eponymous" has to do with naming - it comes to us from the Greek adjective epōnymos, which is itself from onyma, meaning "name." "Onyma" has lent its name to a number of English words, including "synonymous," "pseudonym," and "anonymous." Traditionally, an eponymous person or thing (i.e., an "eponym") might be a mythical ancestor or totem believed to be the source of a clan's name. Today, however, "eponymous" more typically refers to such individuals as the front man of "Theo's Trio" or the owner of "Sally's Restaurant" (Theo and Sally, respectively, of course). The things that are named for such name-providers are also "eponymous." For example, we can speak of "the eponymous 'Ed Sullivan Show'" as well as "the eponymous Ed Sullivan."