Carl XVI Gustaf of Sweden is the current monarch of Sweden having reigned from 1973. He is the youngest and only son of Prince Gustaf Adolf, Duke of Västerbotten. Their only daughter (and Victoria's great-granddaughter) Princess Ingrid of Sweden married Frederick IX of Denmark (reigned 1947–1972) and was the mother of the present Queen Margrethe II of Denmark and the former Queen Anne-Marie of Greece, great-great-granddaughters of Queen Victoria. Their youngest son, Count Carl Johan Bernadotte of Wisborg (1916–2012), was the last great-grandchild of Victoria and Albert to die Queen Victoria → Prince Arthur → Princess Margaret of Connaught → Prince Gustaf Adolf, Duke of Västerbotten → King Carl XVI Gustaf Queen Victoria → Prince Arthur → Princess Margaret of Connaught → Princess Ingrid of Sweden → Danish Queen Margrethe II & Greek Queen Anne-Marie Queen Victoria → Prince Arthur → Princess Margaret of Connaught → Count Carl Johan Bernadotte Children of Arthur, Duke of Connaught, and Princess Louise Margaret of Prussia Prince Leopold, Duke of Albany Prince Leopold (1853–1884) married Princess Helena of Waldeck and Pyrmont (1861–1922) on 27 April 1882 at St George's Chapel, Windsor Castle. They had 1 daughter and 1 son. He inherited the disease of haemophilia from his mother, Queen Victoria, and spent most of his life as a semi-invalid. His daughter, Princess Alice of Albany, married Prince Alexander of Teck, the younger brother of Queen Mary, in 1904 and became Countess of Athlone when her husband was created Earl of Athlone in June 1917. She has so far been the longest-lived Princess of the Blood Royal of Britain and was the last surviving grandchild of Queen Victoria. Prince Charles Edward, Prince Leopold's posthumous son, succeeded him at birth as 2nd Duke of Albany. In 1900, Charles Edward succeeded his uncle Alfred as Duke of Saxe-Coburg and Gotha but was forced to abdicate his ducal throne during the German Revolution of 1918, later gaining high positions in and through the Nazi movement. Because of his support for Germany in World War I, he lost his English knighthood in the Order of the Garter in 1915 and his British royal titles, peerages and honours in 1919. He is the grandfather of Carl XVI Gustaf of Sweden through his elder daughter, Princess Sibylla. Queen Victoria → Prince Leopold → Prince Charles Edward → Princess Sibylla of Saxe-Coburg and Gotha → Carl XVI Gustaf Children of Leopold, Duke