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
Edmund of Woodstock, 1st Earl of Kent he had two children: Thomas (b. 1300) and, when the king was sixty-two, Edmund. Edmund was born at Woodstock in Oxfordshire on 5 August 1301, and was therefore referred to as Edmund of Woodstock. Son of the English king, he was also, through his mother, grandson of Philip III of France. On 7 July 1307, before Edmund had turned six, King Edward I died, leaving Edmund's half-brother Edward to succeed as King Edward II. Though not resident in the two boys' household, Edward I had taken great interest in the princes' upbringing and well-being. Before he died, the king had