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,
George Frederick II, Margrave of Brandenburg-Ansbach He was killed at the Battle of Kittensee in 1703, and as he was unmarried, Ansbach passed to his younger half-brother William Frederick. George Frederick II, Margrave of Brandenburg-Ansbach George Frederick II, Margrave of Brandenburg-Ansbach (3 May 1678 – 29 March 1703), known as George Frederick the Younger, the third son of John Frederick, Margrave of Brandenburg-Ansbach by his first wife the Margravine Joanna Elisabeth of Baden-Durlach (and thus a half-brother of Queen Caroline of Great Britain), succeeded his elder brother as Margrave of Ansbach in 1692. In the War of the Palatinian Succession he fought from 1695 to 1697