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,
Caroline of Ansbach Holland. In mid-1735, Frederick, Prince of Wales, was further dismayed when Caroline, rather than himself, again acted as regent while the King was absent in Hanover. The King and Queen arranged Frederick's marriage, in 1736, to Princess Augusta of Saxe-Gotha. Shortly after the wedding, George went to Hanover, and Caroline resumed her role as "Protector of the Realm". As regent, Caroline considered the reprieve of Captain John Porteous, who had been convicted of murder in Edinburgh. Before she could act, a mob stormed the jail where he was held and killed him. Caroline was appalled. The King's absences abroad were