House of Saxe-Coburg and Gotha
Princess Sibylla Calma Marie Alice Bathildis Feodora of Saxe-Coburg and Gotha (18 January 1908 – 28 November 1972) was the mother of the current King of Sweden, Carl XVI Gustaf. A member of the House of Saxe-Coburg and Gotha, Sibylla became a Swedish princess by marrying Prince Gustaf Adolf, Duke of Västerbotten, who did not live to ascend the Swedish throne.