Duchy of Cornwall from Duchy income, assisted by Grants-in-aid from the Queen. If there is no duke (for example, if the monarch does not have any male children) the duchy income reverts to the monarch and the annual Sovereign Grant is reduced annually by the amount of the duchy's income. The duchy was established on 17 March 1337 by the Royal Great Charter out of the former Earldom of Cornwall by Edward III for his son, Edward, Prince of Wales, the "Black Prince", who became the first Duke of Cornwall. The charter established that the Duke of Cornwall is to be the eldest
Edward the Confessor of Danish rule, and only Leofric was descended from a family which had served Æthelred. Siward was probably Danish, and although Godwin was English, he was one of Cnut's new men, married to Cnut's former sister-in-law. However, in his early years Edward restored the traditional strong monarchy, showing himself, in Frank Barlow's view, "a vigorous and ambitious man, a true son of the impetuous Æthelred and the formidable Emma." In 1043 Godwin's eldest son Sweyn was appointed to an earldom in the south-west midlands, and on 23 January 1045 Edward married Godwin's daughter Edith. Soon afterwards, her brother Harold and