Wales Beaumaris, Caernarfon and Conwy. His son, the future Edward II, was born at Edward's new castle at Caernarfon in 1284. He became the first English Prince of Wales in 1301, which at the time provided an income from northwest Wales known as the Principality of Wales. The title is granted by the monarch to the heir apparent as a personal honour or dignity, and is not heritable, merging with the Crown on accession to the throne. After the failed revolt in 1294–95 of Madog ap Llywelyn – who styled himself Prince of Wales in the Penmachno Document – and the
Prince of Wales son (if and only if he is also the heir apparent) of the King or Queen Regnant of England (subsequently of Great Britain, 1707, and of the United Kingdom, 1801). That he is also the heir apparent is important. Following the death of Prince Arthur, the Prince of Wales, Henry VII invested his second son, the future Henry VIII, with the title—although only after it was clear that Arthur's wife, Catherine of Aragon, was not pregnant; when Frederick, Prince of Wales died while his father reigned, George II created Frederick's son George (the king's grandson and new heir apparent) Prince