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
Edward the Black Prince Prince sustained a heavy loss in the death of his friend Chandos. Several efforts were made by Edward to conciliate the Gascon lords, but they were fruitless and can only have served to weaken the prince's authority. It is probable that John of Gaunt was working against him at the English court, and when he was sent out in the summer to help his elder brother, he came with such extensive powers that he almost seemed as though he had come to supersede him. In the spring Charles raised two large armies for the invasion of Aquitaine; one, under the