Dukedoms of the British Isles by reign Dukedoms of the British Isles by reign This page lists extant dukedoms in the Peerages of the British Isles, listed by the monarch who created them—see also List of dukedoms in the peerages of Britain and Ireland. King Edward III first created the title Duke of Cornwall, the first dukedom in the British Isles, for his son and heir Edward, called the Black Prince. Since 1421 the title has automatically been held by the eldest son of and heir apparent to the sovereign. Since his mother's taking the throne in 1952 the title has been held by Prince Charles, who
Royal coat of arms of the United Kingdom William I, King of Scots. Members of the British royal family are granted their own personal arms which are based on the Royal Arms. Only children and grandchildren in the male line of the monarch are entitled to arms in this fashion: the arms of children of the monarch are differenced with a three-point label; grandchildren of the monarch are differenced with a five-point label. An exception is made for the eldest son of the Prince of Wales, who bears a three-point label. Since 1911, the arms of the Prince of Wales also displays an inescutcheon of the ancient arms