The president of the Rehearsal Club came into royalty because of his marriage to which person?
Prince Christian of Schleswig-Holstein Prince Christian of Schleswig-Holstein (Frederick Christian Charles Augustus; 22 January 1831 – 28 October 1917) was a minor Danish-born German prince who became a member of the British Royal Family through his marriage to Princess Helena of the United Kingdom (25 May 1846 – 9 June 1923), the fifth child and third daughter of Queen Victoria and Prince Albert of Saxe-Coburg-Gotha.
Ethel du Pont Ethel du Pont Roosevelt-Warren (January 30, 1916 – May 25, 1965) was an American heiress and socialite and a member of the prominent du Pont family. She is known for her widely publicized marriage to Franklin D. Roosevelt Jr., son of the 32nd President Franklin D. Roosevelt and Eleanor Roosevelt and her eventual suicide in 1965.