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 of Angoulême over £400 were spent on candles alone. Edward's baptism was also celebrated with "splendid tournaments." One of his godparents was Bishop Jean de Crois. The name the Black Prince chose for his eldest son had been borne by three English kings and had already become a popular name with political implications by the time Edward and his brother, Richard (b. 1367), were born. In Yorkist times, these were the most popular names. After prolonged suffering, Edward died of the bubonic plague; although the exact time of his death is not known, the date of January 1371 is commonly used. The