Who married Guy de Rothschild?

Baron Guy Édouard Alphonse Paul de Rothschild (pronounced [baʁɔ̃ ɡi edwaːʁt‿alfɔ̃s pɔl də ʁɔt.ʃild]; 21 May 1909 – 12 June 2007) was a French banker and member of the Rothschild banking family of France. Between 1967 and 1979, he was the chairman of the French Banque Rothschild, nationalized by the French government in 1982, and maintained investments in other French and foreign companies, including Imerys. He was named to the International Best Dressed List Hall of Fame in 1985.

Marie-Hélène Naila Stephanie Josina de Rothschild (pronounced [maʁi elɛn də ʁɔt.ʃild]; November 17, 1927 – March 1, 1996) was a French socialite who became a doyenne of Parisian high-society and was a member of the prominent Rothschild banking family of France.