James Alexander Loudon (1935-1987) (1935–1987) Parents James Willem Loudon Margarethe Katharine Osieck Children Diane Loudon Gregory Loudon Valerie Loudon Siblings Lydia Frederika Loudon James Theodore Loudon Ronald Henry Loudon Eugenie Mary Loudon Erik Hugo Loudon Margaretha Eugénie Adrienne Loudon Partners Agnes d'Yve de Bavay