The Duke was Warden of
Windsor Forest and resided at
Cranbourne Lodge. He was most known for his secret marriage
1766 to
Maria Walpole, the Dowager Countess of Waldegrave, an illegitimate granddaughter of Sir
Robert Walpole, from nearby
Frogmore House. This marriage and that of his brother prompted the passing of the
Royal Marriages Act 1772. They lived at
St Leonard's Hill in
Clewer, near Windsor, and had three children:
*HRH
Princess Sophia of Gloucester (
Sophia Matilda;
29 May 1773 –
29 November 1844)
*HH Princess Caroline of Gloucester (
Caroline Augusta Maria;
24 June 1774 –
14 March 1775)
*HRH
Prince William Frederick, Duke of Gloucester and Edinburgh (
15 January 1776 –
30 November1834)
Princess Caroline died aged nine months following a
smallpox inoculation, intended to protect her from the disease. As great-grandchildren in the male line of
King George II, Caroline and her siblings were styled
Highness from birth and used the territorial designation of Gloucester in conjunction with their princely styles. After
William Frederick married his cousin
Princess Mary, he and his surviving sister
Sophia received the style of
Royal Highness.