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 wedding to George Augustus; they were married that evening in the palace chapel at Herrenhausen. By May of the following year, Caroline was pregnant, and her first child Prince Frederick was born on 20 January 1707. A few months after the birth, in July, Caroline fell seriously ill with smallpox followed by pneumonia. Her baby was kept away from her, but George Augustus remained at her side devotedly, and caught and survived the infection himself. Over the next seven years, Caroline had three more children, Anne, Amelia, and Caroline, all of whom were born in Hanover. George Augustus and Caroline