Duke of Gloucester and Edinburgh

Duke of Gloucester and Edinburgh was a British title (after Gloucester and Edinburgh) in the Peerage of Great Britain; the sole creation carried with it the subsidiary title of Earl of Connaught.

It existed for the brother of King George III, Prince William Henry; there had been Dukedoms of Gloucester and of Edinburgh but their extinction gave the opportunity for combination.

The dukedom of Gloucester and Edinburgh was a royal dukedom when the duke was entitled to the style "His Royal Highness", as Prince William Henry was, but Prince William Frederick was only granted this style on his marriage in 1816.

Dukes of Gloucester and Edinburgh
After the Union of Great Britain, the Hanoverian kings liked to grant double titles (one from one constituent country, one from another) to emphasise unity.

House of Hanover 1764–1805 also: Earl of Connaught Leicester House son of Frederick, Prince of Wales and Princess Augusta of Saxe-Gotha 1766 3 children Gloucester House aged 61
 * Prince William Henry
 * [[File:After Sir William Beechey (1753-1839) - William Henry, Duke of Gloucester (1743-1805) - RCIN 402458 - Royal Collection. (Cropped).jpg|100px|Prince William]]
 * 25 November 1743
 * Maria Walpole
 * 25 August 1805

House of Hanover 1805–1834 also: Earl of Connaught Teodoli Palace son of Prince William Henry and Maria Walpole (his first cousin) 1816 no children Bagshot Park aged 58
 * Prince William Frederick
 * Prince William Frederick
 * 2ndDukeOfGloucester.jpg
 * 15 January 1776
 * Princess Mary of the United Kingdom
 * 30 November 1834
 * colspan=5|William Frederick had no children and all his titles became extinct on his death.
 * }
 * }