Duke of Sussex was a title in the Peerage of the United Kingdom

Peerage of the United Kingdom

The Peerage of the United Kingdom comprises most peerages created in the United Kingdom of Great Britain and Ireland after the Act of Union in 1801, when it replaced the Peerage of Great Britain...

. It was conferred on 27 November 1801 upon The Prince Augustus Frederick

Prince Augustus Frederick, Duke of Sussex

The Prince Augustus Frederick, Duke of Sussex , was the sixth son of George III of the United Kingdom and his consort, Charlotte of Mecklenburg-Strelitz. He was the only surviving son of George III who did not pursue an army or naval career.- Early life :His Royal Highness The Prince Augustus...

, the sixth son of George III

George III of the United Kingdom

George III was King of Great Britain and King of Ireland from 25 October 1760 until the union of these two countries on 1 January 1801, after which he was King of the United Kingdom of Great Britain and Ireland until his death...

, who was created Duke of Sussex, Earl of Inverness, and Baron Arklow, all in the Peerage of the United Kingdom. Since he died without legitimate issue, the title became extinct.

In 1999, with the marriage of The Prince Edward

Prince Edward, Earl of Wessex

Prince Edward, Earl of Wessex KG GCVO is the third son and fourth child of Elizabeth II and The Duke of Edinburgh...

 younger son of Elizabeth II, experts had suggested the Dukedom of Sussex or Cambridge

Duke of Cambridge

Duke of Cambridge is a title which has been conferred upon members of the British royal family several times. It was first used as a designation for Charles Stuart , the eldest son of James, Duke of York , though he was never formally created Duke of Cambridge...

 as the most likely to be granted to Prince Edward, but he was instead created Earl of Wessex

Earl of Wessex

The title Earl of Wessex has been created twice in British history, once in the pre-Conquest Anglo-Saxon nobility of England and once in the Peerage of the United Kingdom...

 (on the understanding that he would be awarded a new Dukedom of Edinburgh

Duke of Edinburgh

The Duke of Edinburgh is a British royal title, named after the city of Edinburgh, Scotland, which has been conferred upon members of the British royal family only four times times since its creation in 1726...

 after his parents' deaths). There was again speculation that Prince William of Wales was to be given the title at the time of his April 2011 wedding to Catherine Middleton. The Queen in fact created him Duke of Cambridge

Duke of Cambridge

Duke of Cambridge is a title which has been conferred upon members of the British royal family several times. It was first used as a designation for Charles Stuart , the eldest son of James, Duke of York , though he was never formally created Duke of Cambridge...

.

Dukes of Sussex (1801)

Other titles: Earl of Inverness and Baron Arklow (1801)

• The Prince Augustus Frederick
  Prince Augustus Frederick, Duke of Sussex
  The Prince Augustus Frederick, Duke of Sussex , was the sixth son of George III of the United Kingdom and his consort, Charlotte of Mecklenburg-Strelitz. He was the only surviving son of George III who did not pursue an army or naval career.- Early life :His Royal Highness The Prince Augustus...
  
  , 1st Duke of Sussex (1773–1843), sixth son of George III
  George III of the United Kingdom
  George III was King of Great Britain and King of Ireland from 25 October 1760 until the union of these two countries on 1 January 1801, after which he was King of the United Kingdom of Great Britain and Ireland until his death...
  
  , died without legitimate issue