He was the son of Marie Julie Pamphile Berthe de Béhague, Comtesse de Ganay (1868-1940) and Charles Alexandre Anne Jean de Ganay, Comte de Ganay (1861-1948), and nephew of Beatrice Winans (Comtesse de Béarn) (1884-1907) and Henri Louis Elie Joseph de Galard de Béarn (1874-1947), Comte de Brassac. He was remotely related to Whistler through Whistler's half-brother William McNeill Whistler (1836-1900).
He inherited Head of a Peasant Woman y021 and sold it to the University of Glasgow.
Young, Andrew McLaren, Margaret F. MacDonald, Robin Spencer, and Hamish Miles, The Paintings of James McNeill Whistler, New Haven and London, 1980 .