Born Marie-Jeanne Louis-Dreyfus, she was one of three children born to Jean and Jeanne Madeline (née Depierre) Louis-Dreyfus. Her brother is Robert Louis-Dreyfus and her sister is Monique Roosmale Nepveu. Her Father was Jewish and her mother Roman Catholic. She is the great granddaughter of Léopold Louis-Dreyfus, founder of the Louis-Dreyfus Group, which had begun buying and selling wheat in the Alsace region a century earlier, and rapidly Diversified into shipping, oil and other commodities. Her grandfather was Louis Louis-Dreyfus who served in the French Parliament during the French Third Republic. After the death of her brother Robert, his widow and second wife Margarita Louis-Dreyfus (b: Rita Bogdanova), inherited 60% of the Louis Dreyfus Group (later increased to 65% in 2012). As of 2013, Marie-Jeanne owned 12.5% of the Louis Dreyfus Group making her a Billionaire. In 2009, she founded the venture capital company Florac SAS.
