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
British prince a title conferred on the eldest son of the sovereign since the reign of Edward I of England. In the Kingdom of Scotland, even though an honorific principality was created by James I, the heir-apparent was only referred to as Duke of Rothesay. Some others include John, brother of Richard the Lionheart and later King John, who is sometimes called Prince John. After the accession of George I (the first monarch from the House of Hanover), it became customary for the sons of the sovereign and grandsons of the sovereign in the male line to be titled 'Prince' and styled