Frederick Gilmer Bonfils was an American businessman and publisher who, alongside Harry Heye Tammen, owned The Denver Post, the Kansas City Post, and the Sells Floto Circus.

Heinrich "Harry" Heye Tammen was an American journalist, publisher, and businessman. He worked alongside Frederick Gilmer Bonfils and co-owned The Denver Post, the Kansas City Post, and the Sells Floto Circus.