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.
Happy Rockefeller Margaretta Large Fitler Murphy "Happy" Rockefeller (June 9, 1926 – May 19, 2015) was a philanthropist and the second wife of the 49th Governor of New York and 41st Vice President of the United States, Nelson Aldrich Rockefeller (1908–1979). She was First Lady of New York from her marriage to then-Governor Rockefeller in 1963 until he left office in 1973, and Second Lady of the United States from her husband's swearing in as Vice President on December 19, 1974 until his term ended on January 20, 1977.