Duchess of Courland House of Kettler, 1561–1737 Picture Name Father Birth Marriage Became Duchess Ceased to be Duchess Death Spouse Anna of Mecklenburg Albrecht VII, Duke of Mecklenburg(Mecklenburg) 14 October 1533 3 November 1566 17 May 1587husband's death 4 July 1602 Gotthard Kettler Elisabeth Magdalena of Pomerania Ernst Ludwig, Duke of Pomerania(Pomerania) 14 June 1580 14 March 1600 17 August 1642husband's desposition 23 February 1649 Friedrich Kettler Sophia of Prussia Albert Frederick, Duke of Prussia(Hohenzollern) 31 March 1582 22 October 1609 4 December 1610 Wilhelm Kettler Louise Charlotte of Brandenburg George William, Elector of Brandenburg(Hohenzollern) 13 September 1617 9 October 1645 29 August 1676 Jacob Kettler Sophie Amalie of Nassau-Siegen Henry of Nassau-Siegen(Nassau-Siegen) 10 January 1650 25 October 1675 1 January 1682father-in-law’s death 25 December 1688 Friedrich Casimir Kettler Elisabeth Sophie of Brandenburg Frederick William I, Elector of Brandenburg(Hohenzollern) 5 April 1674 29 April 1691 22 January 1698husband's death 22 November 1748 Anna Ivanovna of Russia Ivan V of Russia(Romanov) 7 February 1693 11 November 1710 21 January 1711husband's death 28 October 1740 Friedrich Wilhelm Kettler Johanna Magdalene of Saxe-Weissenfels Johann Georg, Duke of Saxe-Weissenfels(Wettin) 17 March 1708 20 September 1730 4 May 1737husband's death 25 January 1760 Ferdinand Kettler
House of Biron, 1737–1740 Picture Name Father Birth Marriage Became Duchess Ceased to be Duchess Death Spouse Benigna Gottliebe von Trotha genannt Treyden Wilhelm von Trotha Truiden 15 October 1703 25 February 1723 June 1737husband's election 19 November 1740husband exiled 5 November 1782 Ernst Johann von Biron
Council of the Duke, 1740–58
House of Wettin, 1758–1763 None, although Charles of Saxony was morganatically married with the Polish countess Franciszka Korwin-Krasińska.
House of Biron, 1763–1795 Picture Name Father Birth Marriage Became Duchess Ceased to be Duchess Death Spouse Benigna Gottliebe von Trotha genannt Treyden Wilhelm von Trohta Truiden 15 October 1703 25 February 1723 1763husband's restoration 1769husband abdication 5 November 1782 Ernst Johann von Biron Caroline of Waldeck and Pyrmont Karl August, Prince of Waldeck and Pyrmont(Waldeck-Pyrmont) 14 August 1748 15 October 1765 1769husband's restoration 1772divorce 18 August 1782 Peter von Biron Yevdokiya Borisovna Yusupova Prince Boris Grigorievich Yusupov(Yusupov) 16 May 1743 6 March 1774 1778divorce 19 July 1780 Dorothea von Medem Count Friedrich von Medem(Medem) 3 February 1761 6 November 1779 28 March 1795Duchy abolished 20 August 1821