Boniface de Castellane (1897-1946)

Marie Louis Jean Jay Georges Paul Ernest Boniface, Marquis de Castellane (17 January 1897 – 5 February 1946), was a French nobleman and diplomat.

He was the eldest son of American railroad heiress Anna Gould and Boni de Castellane, who was known as a leading Belle Époque tastemaker.

His maternal grandparents were the American railroad magnate and financial speculator, Jay Gould, and Helen Day Miller.

On July 19 nearly 1,500 French diplomats, other officials and soldiers left London for France, headed by the Marquis.

"[7] On 6 January 1921, while still known as the Count of Castellane, he was married to Yvonne Constance Patenôtre (1896–1981), in Paris with his uncle, Frank Gould, as best man.