A pojmanym is an uncapitalized word that is derived from a proper noun. The word is itself a pojmanym as it refers to brothers Jim and John Pojman who first used the word in 1975. A pojmanym is similar to, but not the same as, an eponym and a toponym. An eponym is a word formed from a person's name; e.g. Darwinism is the eponym of Darwin. A toponym is an eponym derived from a place name. Many eponyms and toponyms are also pojmanyms; e.g., bikini.