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Duke of Edinburgh, King Charles III of the United Kingdom, King George I of Great Britain, King George VI of the United Kingdom, Peerage of Great Britain, Peerage of the United Kingdom, Prince Alfred, Prince Edward, Prince Frederick Louis, Prince Philip, Queen Victoria of the United Kingdom
Duke of Edinburgh, named after the city of Edinburgh in Scotland, is a substantive title that has been created four times since 1726 for members of the British royal family. It does not include any territorial landholdings and does not produce any revenue for the title holder.
1726 Creation

HRH Prince Frederick Louis, Duke of Edinburgh
The title was first created in the Peerage of Great Britain on July 26, 1726 by King George I of Great Britain, who bestowed it on his grandson Prince Frederick Louis, who also became Prince of Wales the following year.
The subsidiary titles of the dukedom were Marquess of the Isle of Ely, Earl of Eltham, in the County of Kent, Viscount of Launceston, in the County of Cornwall, and Baron of Snowdon, in the County of Caernarvon, all of which were also in the Peerage of Great Britain.
The marquessate was gazetted as Marquess of the Isle of Wight, apparently erroneously. In later editions of the London Gazette the Duke is referred to as the Marquess of the Isle of Ely.
After Prince Frederick Louis was created Prince of Wales and Earl of Chester and had inherited all the other titles associated with the Prince of Wales and Earl of Chester titles: Duke of Cornwall (as heir to the throne in England) titles: Duke of Rothesay (heir apparent to the King of Scots), High Steward of Scotland and Lord of the Isles, he still remained Duke of Edinburgh.
Upon Frederick Louis death in 1751 the titles were inherited by his son Prince George. When Prince George became King George III in 1760, the titles merged in the Crown and ceased to exist.
1866 Creation

HRH Prince Alfred, Duke of Edinburgh
Queen Victoria re-created the title, this time in the Peerage of the United Kingdom, on 24 May 1866 for her second son Prince Alfred, instead of Duke of York, the traditional title of the second son of the monarch. The subsidiary titles of the dukedom were Earl of Kent and Earl of Ulster, also in the Peerage of the United Kingdom.
When Alfred became the reigning Duke of Saxe-Coburg and Gotha in 1893, he retained his British titles. His only son that survived birth, Alfred, Hereditary Prince of Saxe-Coburg and Gotha, committed suicide in 1899, so the Dukedom of Edinburgh and subsidiary titles became extinct upon the elder Alfred’s death in 1900.
1947 Creation

HRH Prince Philip, Duke of Edinburgh
The title was created for a third time on November 19, 1947 by King George VI, who bestowed it on his son-in-law Philip Mountbatten, when he married Princess Elizabeth. Subsequently, Elizabeth was styled “HRH The Princess Elizabeth, Duchess of Edinburgh” until her accession in 1952.
The subsidiary titles of the dukedom were Earl of Merioneth and Baron Greenwich, of Greenwich in the County of London; all these titles were in the Peerage of the United Kingdom. Earlier that year, Philip had renounced his Greek and Danish royal titles (he was born a Prince of Greece and Denmark, being a male-line grandson of King George I of the Hellenes and male-line great-grandson of King Christian IX of Denmark) along with his rights to the Greek throne. In 1957, Philip became a Prince of the United Kingdom in his own right.
Upon Philip’s death on April 9, 2021, his eldest son Charles, Prince of Wales, succeeded to all of his hereditary titles. Upon Charles’s accession to the throne on September 8, 2022, the peerages merged in the Crown and ceased to exist.
2023 Creation

HRH Prince Edward, Duke of Edinburgh
It was announced in 1999, at the time of the wedding of Prince Edward, Earl of Wessex, that he would eventually follow his father as Duke of Edinburgh.
It was expected that a new, fourth creation would be bestowed on Prince Edward after the third creation reverted to the Crown when Charles III acceded to the throne. In July 2021, The Times reported that Charles had decided not to give the title to his brother upon accession. Clarence House stated that “all stories of this nature are speculation, no final decisions have been taken” and declined to comment further.
The title was created for a fourth time on March 10, 2023 by King Charles III, who bestowed it on his brother Prince Edward, when he turned 59. The title will be held by Prince Edward for his lifetime, as a non-hereditary peerage title.