Princess Mary of Great Britain Princess Mary of Great Britain Princess Mary of Great Britain (5 March 1723 – 14 January 1772) was the second-youngest daughter of King George II of Great Britain and his wife Caroline of Ansbach, and Landgravine of Hesse-Kassel as the wife of Landgrave Frederick II. Princess Mary was born at Leicester House, Westminster, London. Her father was the Prince of Wales, later King George II. Her mother was Caroline of Ansbach, daughter of Johann Friedrich, Margrave of Brandenburg-Ansbach. Her father succeeded, as George II, on 11 June 1727, and she became "HRH The Princess Mary". Upon her death in 1737,
Sophia Jagiellon, Margravine of Brandenburg-Ansbach Sophia Jagiellon, Margravine of Brandenburg-Ansbach Sophia of Poland (, 6 May 1464 – 5 October 1512), was a princess, member of the Jagiellonian dynasty, great grand daughter of Emperor Sigismund and by marriage Margravine of Brandenburg-Ansbach and Brandenburg-Kulmbach. Born in Kraków, she was the second daughter of Grand Duke of Lithuania and King Casimir IV of Poland and his wife Archduchess Elisabeth of Austria, daughter of the German king Albrecht. She was named after her paternal grandmother, Sophia of Halshany, Queen of Poland. Sophia was baptised by John Gruszczynski, Bishop of Krakow. There is no information available concerning Sophia's upbringing