Julius' similarity to Felix the Cat, who was created in 1919 by Otto Messmer for Pat Sullivan's studio, was not accidental, but due to Margaret Winkler urging the reluctant Disney to copy Felix.
By the 1960s, Felix had been reinvented for television, and Messmer's longtime assistant Joe Oriolo (the creator of Casper the Friendly Ghost) made sure that Messmer was finally credited as the creator of Felix the Cat.
Otto von Bismarck | Otto | Otto III | Otto Piene | Otto I, Holy Roman Emperor | Otto I | Otto Preminger | Otto II | Otto Dix | Otto Natzler | Otto II, Holy Roman Emperor | Otto Binder | Otto Skorzeny | Otto Schenk | Otto of Brunswick | Otto Kerner, Jr. | Otto Steinbrinck | Otto Kerner | Otto IV, Holy Roman Emperor | Otto IV | Otto III, Holy Roman Emperor | Otto Braun | Miranda Otto | Frei Otto | Otto-Werner Mueller | Otto Schmidt | Otto Muehl | Otto Lilienthal | Otto Klemperer | Otto Hermann Kahn |
Woos Whoopee (sometimes referred to as Felix The Cat in Woos Whoopee or Felix Woos Whoopee) is a surreal, animated 1928 Felix the Cat silent short subject produced by Otto Messmer and Pat Sullivan.