Maria Josepha of Austria
Maria Josepha of Austria (Maria Josepha Benedikta Antonia Theresia Xaveria Philippine, ; 8 December 1699 – 17 November 1757) was the Queen of Poland by marriage to Augustus III.
From 1711 to 1717, she was heir presumptive to the Habsburg Empire.
Her sister Maria Amalia became Electress of Bavaria.
Prince Daniel of Saxony
Prince Daniel Timo of Saxony, Duke of Saxony( born 23 June 1975) is the oldest son of Prince Rüdiger of Saxony, a disputed Head of the Royal House of Saxony.
Prince Johann Georg of Saxony
Prince Johann Georg Pius Karl Leopold Maria Januarius Anacletus of Saxony, Duke of Saxony (10 July 1869 – 24 November 1938) was the sixth child and second-eldest son of George of Saxony and his wife Maria Anna of Portugal and a younger brother of the Kingdom of Saxony's last king, Frederick Augustus III of Saxony.
Johann Georg was a well-known arts expert and an avid art collector.
Franciszka Krasińska
Franciszka Krasińska( 1742 in Maleszowa – 30 April 1796 in Dresden), was a Polish noblewoman and wife of Charles of Saxony, Duke of Courland, the son of King Augustus III of Poland.
Maria Emanuel, Margrave of Meissen
Maria Emanuel, Prince of Saxony, Duke of Saxony, Margrave of Meissen( 31 January 1926 – 23 July 2012) was the head of the Royal House of Saxony.
Rüdiger, Margrave of Meissen
Prince Rüdiger Charles Ernest Timo Aldi of Saxony, Duke of Saxony, Margrave of Meissen( born 23 December 1953) is a disputed head of the Royal House of Saxony, and the only agnatic( male line or paternal) great- grandson of the last King of Saxony, Frederick Augustus III.
Charles of Saxony, Duke of Courland
Prince Karl Christian Joseph of Saxony - in English, Charles of Saxony - (13 July 1733 – 16 June 1796) was a German prince of the House of Wettin and Duke of Courland and Semigallia.
Born in Dresden, he was the fifth and third surviving son of Augustus III, King of Poland and Elector of Saxony, and Maria Josepha of Austria.
He is an ancestor of the Italian House of Savoy.
Prince Maximilian of Saxony (1870–1951)
Prince Maximilian William Augustus Albert Charles Gregory Odo of Saxony, Duke of Saxony( 17 November 1870 – 12 January 1951) was a member of the Albertine branch of the House of Wettin and a Roman Catholic priest.
Albert, Margrave of Meissen (1934–2012)
Prince Albert Joseph Maria Franz-Xaver of Saxony, Duke of Saxony, Margrave of Meissen (30 November 1934 – 6 October 2012) was the head of the Royal House of Saxony and a German historian.
The fourth child and youngest son of Friedrich Christian, Margrave of Meissen and his wife Princess Elisabeth Helene of Thurn and Taxis, he was the younger brother of Maria Emanuel, Margrave of Meissen, who was his predecessor as head of the Royal House of Saxony.
Gotthard Kettler
Gotthard Kettler, Duke of Courland (also "Ketteler", ; 2 February 1517 – 17 May 1587) was the last Master of the Livonian Order and the first Duke of Courland and Semigallia.

Question: When did Charles Of Saxony, Duke Of Courland's mother die?
Answer: 17 November 1757