Career
He succeeded his elder half-brother Elim Pavlovich Demidov, 3rd Prince of San Donato in 1943 but died in exile in the same year without male issue. Anatoly Demidov was the son of Princess Elena Petrovna Trubetskaya and Pavel Pavlovich Demidov, 2nd Prince of San Donato. His father died when young Anatoly was just 11 years old.
Princess and Countess Elena Anatolyevna Demidova (Saint St. Petersburg, 28 August Operating system: 15 August 1901 - Montreal, 26 June 1970), married in Nice on 29 July 1926 Paul René Geoffroy (Nyons, 2 May 1903 - Montreal, 27 October 1991)
Princess and Countess Evgenia Anatolyevna Demidova (Saint St. Petersburg, 25 September Operating system: 12 September 1902 - Cazouls-lès-Béziers, 25 April 1955), married in Nice on 29 September 1927 Jean Gerber (Sevastopol, 2 February 1905 - Geneva, 9 September 1981)
Princess and Countess Aurora Anatolyevna Demidova (Wiesbaden, 11 December 1909 - Marseille, 17 March 1944), married in Marseille on 29 July 1933 Jean Giraud (Marseille, 26 October 1912 - Nice, 5 February 1962).
