King Michael I Queen Victoria → Prince Alfred → Princess Marie of Edinburgh (Queen of Romania) → Princess Elisabeth of Romania (Queen of the Hellenes) Queen Victoria → Prince Alfred → Princess Marie of Edinburgh (Queen of Romania) → Princess Marie of Romania (Queen of Yugoslavia) → King Peter II Children of Alfred, Duke of Edinburgh, and Grand Duchess Marie Princess Helena Princess Helena (1846–1923) married Prince Christian of Schleswig-Holstein (1831–1917) in Windsor Castle's private chapel on 5 July 1866. Two sons and two daughters survived childhood; two other sons died within ten days of their birth. Princess Helena and Prince Christian had no legitimate grandchildren and one natural granddaughter who died without having issue of her own. Like other British royal holders of German titles (such as Admiral Louis Battenberg), Princess Helena, Prince Christian, and their two daughters gave up their titles to Schleswig-Holstein in 1917 when the British and German Empires were at war. Children of Princess Helena and Prince Christian of Schleswig-Holstein Princess Louise Princess Louise (1848–1939), who married John Campbell, 9th Duke of Argyll (1845–1914) in 1871, was the only one of Victoria's nine children who was childless. She was the first British monarch's child since 1515 to marry a subject rather than someone of royal blood. Prince Arthur, Duke of Connaught and Strathearn Prince Arthur (1850–1942) married Princess Louise Margaret of Prussia (1860–1917) on 13 March 1879 at St George's Chapel in Windsor Castle. They had 2 daughters and 1 son. In March 1911, the Duke of Connaught's nephew, George V (son of the Duke's recently deceased brother Edward VII) appointed his uncle to represent him as Governor General of Canada. He thus became the first, and so far only, Governor General of Canada to be of the Blood Royal, although he had been preceded in this office from 1878 to 1883 by the Marquess of Lorne, the non-royal husband of his sister Princess Louise (see above). [George V's son, the Duke of Gloucester, was later Governor-General of Australia, and the Duke of Connaught's own son was later Governor-General of South Africa. See above and below.] Prince Arthur's elder daughter (and Queen Victoria's granddaughter) Princess Margaret of Connaught became Crown Princess of Sweden in 1907 after marrying the future Gustaf VI Adolf of Sweden in 1905 (however, Margaret died before Gustav became king). Princess Margaret and Prince Gustav Adolf's grandson (and a great-great-grandson of Victoria)