Harry Payne Whitney was an American businessman, thoroughbred horse breeder, and member of the prominent Whitney family.

William Payne Whitney was an American businessman and member of the influential Whitney family. He inherited a fortune and enlarged it through business dealings, then devoted much of his money and efforts to a wide variety of philanthropic purposes. His will included funds to expand the New York Hospital, now called NewYork-Presbyterian Hospital, where the Payne Whitney Psychiatric Clinic was established.