John Edward Madden was a prominent American Thoroughbred and Standardbred owner, breeder and trainer in the late nineteenth and early twentieth century. He owned Hamburg Place Stud in Lexington, Kentucky and bred five Kentucky Derby and Belmont Stakes winners.

Hamburg (1895–1915) was an American Thoroughbred race horse. The leading American colt of his generation, Hamburg was retrospectively named the American Horse of the Year for 1898. After his racing career he went on to be a successful sire.