Duke of Clarence was a substantive title created three times in the Peerage of England. The title Duke of Clarence and St Andrews has also been created in the Peerage of Great Britain, and Duke of Clarence and Avondale and Earl of Clarence in the Peerage of the United Kingdom. The titles have traditionally been awarded to junior members of the English and British royal family, and all are now extinct.

Duke of Connaught and Strathearn was a title in the Peerage of the United Kingdom that was granted on 24 May 1874 by Queen Victoria of the United Kingdom of Great Britain and Ireland to her third son, Prince Arthur. At the same time, he was also granted the subsidiary title of Earl of Sussex.