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 leading to unpopularity, and in late 1736 he made plans to return, but his ship was caught in poor weather, and it was rumoured that he had been lost at sea. Caroline was devastated, and disgusted by the insensitivity of her son, who hosted a grand dinner while the gale was blowing. During her regency, the Prince of Wales attempted to start a number of quarrels with his mother, whom he saw as a useful proxy to irritate the King. George eventually returned in January 1737. Frederick applied to Parliament unsuccessfully for an increased financial allowance that had hitherto been