Louise Alexandra Marie Irene Mountbatten became Queen consort of Sweden in 1950 and served as such until her death in 1965. Through her marriage, prior to her husbands accession as King Gustaf VI Adolf, Louise was Crown Princess of Sweden and Duchess of Scania.
Louise was born a Princess of Battenberg at Heiligenberg Castle, SeeheimJugenheim, in the Grand Duchy of Hesse. Her father, Prince Louis of Battenberg, who was Admiral of the Fleet in the United Kingdom, renounced his German title during World War I and anglicised his family name to Mountbatten at the behest of King George V. He was then created the first Marquess of Milford Haven in the peerage of the United Kingdom. From 1917, therefore, his daughter was known as Lady Louise Mountbatten. Louise was a sister of Louis Mountbatten, 1st Earl Mountbatten of Burma, an aunt of Prince Philip, Duke of Edinburgh, and was also a niece of Empress Alexandra Feodorovna of Russia.
Source: Wikipedia