 His son Jean-Louis de Cartier de Marchienne is a member of the board of Carta Mundi.Louis Alphonse de Cartier was the third of five children of colonel-pilot Raoul de Cartier (1884-1941) and Josa Versteylen (1896-1983).His brother Raoul de Cartier (1924-1944) was member of the Belgian Resistance.