Princess of Liechtenstein, and maternal aunt of her sisters, Duchess Marie-Caroline, Duchess Helene, Duchess Elisabeth and Duchess Maria-Anna, who all are princesses of Bavaria. Her elder sister Princess Elisabeth (b. 1940) is married to Prince Max, Duke in Bavaria, heir presumptive to the Headship of the Royal House of Bavaria and also heir presumptive to the Jacobite pretensions to the thrones of England, Scotland, Ireland, and France. Her elder brother is Swedish businessman Count Gustaf Douglas. Her maternal aunt was Libertas Schulze-Boysen née Haas-Heye (1913–1942), who with her husband, Harro Schulze-Boysen (1909–1942), was executed by the Nazis. Her maternal great-grandfather was Prince Philipp, 1st Prince of Eulenburg and Hertefeld (a close friend of Emperor Wilhelm II of Germany), whose youngest child, Princess Viktoria Ada Astrid Agnes of Eulenburg and Hertefeld (1886–1967), was married in 1909 (divorced in 1921) to professor Otto Ludwig Haas-Heye (1879–1959) and had issue, including two daughters. Rosita descends through both her mother and father from medieval Scandinavian nobility and rulers. However, her father's patriline is Scottish, of the Swedish-German branch, descended via two obscure generations from the youngest son of James Douglas, 1st Baron of Dalkeith, ancestor of the 15th century Earls of Morton. All these Douglasses were of the Morton branch of the ancient Clan Douglas. References External links , including official biography Biography Descendants of Count Carl Israel Douglas and his wife, an illegitimate daughter of a Grand Duke of Baden (patrilineal ancestors of Rosita), also archived at family history website. Retrieved 12 December 2008. Partial ancestry of Rosita Marlborough with ancestors no. 14 and 15 being her parents. 1943 births Living people British painters Swedish emigrants to the United Kingdom English duchesses by marriage Rosita Spencer-Churchill, Duchess of Marlborough Rosita Spencer-Churchill, Duchess of Marlborough