Yelena Trubetskaya (1853-1917) (1853–1917) Parents Elizabeth Trubetskaya Pyotr Trubetskoy Children Nikita Pavlovich Demidoff, Principe di San Donato Maria Pavlovna Demidova Anatoly Pavlovich Demidov, 4th Prince of San Donato Helene Pavlovna Demidoff, Principessa di San Donato Aurora Pavlovna Demidova Paul Pavlovich Demidoff, Principe di San Donato Siblings Mariya Trubetskaya Partners Pavel Pavlovich Demidov, 2nd Prince of San Donato