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.
Princess Antoinette of Anhalt Princess Antoinette of Anhalt (German: "Antoinette Anna Alexandra Marie Luise Agnes Elisabeth Auguste Friederike" ; 3 March 1885 – 3 April 1963) was a Princess of Anhalt by birth. As the wife of Prince Frederick of Schaumburg-Lippe, she became a Princess of Schaumburg-Lippe by marriage.