Listed below is the information from Wikipedia, that I pulled regarding Prince Arthur, Duke of Connaught's heir. It appears that the title died with his son.
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Prince Alastair of Connaught (Alastair Arthur Windsor), (
August 9,
1914-
April 26,
1943) was a member of the
British Royal Family, a great grandson of
Queen Victoria. Prince Alastair was denied the title of a
British prince and the style
His Highness in
1917. Afterwards he held the courtesy title of
Earl of MacDuff and later inherited his grandfather's titles of
Duke of Connaught and Strathearn.
Early Life
Alastair was born on
August 9,
1914 in
London. His parents were was
Prince Arthur of Connaught, the only son of
Prince Arthur, Duke of Connaught and Princess Arthur of Connaught (nee
Princess Alexandra, Duchess of Fife, the eldest daughter of
Princess Louise, Princess Royal). As a great grandchild of the
British monarch through the male line, Alastair was styled
His Highness Prince Alastair of Connaught.
House of Windsor
Shortly after Alastair was born,
World War I broke out, prompting strong anti-German feelings in the
United Kingdom.
King George V responded to this by changing the name of the
Royal House from the
House of Saxe-Coburg-Gotha to the
House of Windsor and relinquished all Germanic titles from royals who were British citizens.
In Letters Patent dated
November 20,
1917, King George V undertook further restructuring of the royal styles and titles by restricting the titles of Prince or Princess and the style of
Royal Highness to the children of the sovereign, the children of the sovereign's sons, and the eldest living son of the eldest son of the Prince of Wales. It further stated all titles of "the grandchildren of the sons of any such Sovereign in the direct male line (save only the eldest living son of the eldest son of the Prince of Wales) shall have the style and title enjoyed by the children of Dukes."1 At that point, the three year-old became known as
Alastair Arthur Windsor, Earl of MacDuff. Although second in line to the dukedom of Connaught and Strathearn as well as earldom of Sussex at the time of his birth, heir of his father who was the
heir apparent, he was the
heir apparent to his mother's dukedom of Fife. Therefore, he used his mother's secondary peerage as a
courtesy title.
Army service
Alastair received his education at Bryanston and at
Sandhurst. In January 1935, he received a commission as a second lieutenant in the Royal Scot Greys (2nd Dragoon), the same regiment in which his father served. He was posted to
Egypt in 1936 and remained there until his transfer to
Canada in 1939. He received a promotion to first lieutenant in July 1939. Alastair served as an aide-de-camp to
Earl of Athlone, then the
governor-general of Canada. His father, Prince Arthur of Connaught, died on
September 12,
1938. Therefore, when his grandfather died on
January 16,
1942, he succeeded as 2nd Duke of Connaught and Strathearn and Earl of Sussex.
Alastair died at Government House in
Ottawa, where he had been a guest of the Earl of Athlone and
Princess Alice, Countess of Athlone. His ashes were interred at Mar Lodge Chapel,
Braemar,
Aberdeenshire. Upon his death, the dukedom of Connaught and Strathearn became extinct. His first cousin, James Carnegie (
September 23,
1929-), succeeded as 3rd Duke of Fife and Earl of MacDuff, upon Princess Alexandra's death on
February 26,
1959.