Diane Cécile Alice Juliette de Rothschild (1907-1996)

Diane Cécile Alice Juliette de Rothschild, the eldest child of Robert de Rothschild and his wife Nelly, was born in Paris on 12 December 1907.

She became an ambassadress in her own country, having married the Polish diplomat Anatole Mühlstein (1889-1957) on 4 May 1932. Mühlstein had been active in the Belgian resistance in the First World War, and joined the Polish diplomatic service in 1919, later serving as Chargé d'affaires for the Polish embassy in Brussels in 1927 and as Minister Plenipotentiary for the Polish embassy in Paris 1930–1936.

Diane and Anatole had three daughters. Nathalie (1934-2002) qualified as one of the youngest doctors in Paris, specialising in pediatric endocrinology. Anka (b.1935), became a historian and biographer; the third, (Hélène) Cécile (1936-2007) became a painter. 

After the German invasion of France, in early June 1940 Mühlstein took his family to Lisbon via Bordeaux, just ahead of France's capitulation. Soon after, the family emigrated to New York. At the end of the war, the Mühlsteins returned to Paris, but the marriage did not survive, and the couple divorced.

In 1952, Diane married the Italian classical pianist, violinist and music teacher Joseph (Guiseppe) Benvenuti (1898-1967).

Diane died in Paris on 17 November 1996.