William Keeney Bixby was a business man and collector in St Louis, Mo. He married Lillian Tuttle (1856-1931). They had seven children including William Hoxie Bixby (1888-1967).
He owned Grey and Silver: Pourville y522, which was brought over to him by Charles Lang Freer, a business colleague.
He donated a large collection of books and manuscripts to the Missouri Historical Society and supported the St. Louis Art Museum, of which he was president of the Art Museum.
Dictionary of American Biography.
FindAGrave website.