He was the husband of Marie Julie Pamphile Berthe de Béhague, Comtesse de Ganay (1868-1940) and father of Octave Marie Hubert de Ganay, Marquis de Ganay (1888-1974).
His wife owned Head of a Peasant Woman y021.
Young, Andrew McLaren, Margaret F. MacDonald, Robin Spencer, and Hamish Miles, The Paintings of James McNeill Whistler, New Haven and London, 1980