House of Tudor ruled their domains for just over a century. Henry VIII was the only son of Henry VII to live to the age of maturity. Issues around the royal succession (including marriage and the succession rights of women) became major political themes during the Tudor era. The House of Stuart, descended from Henry VII's daughter Margaret, came to power in 1603 when Elizabeth I died and the Tudor line failed. For analysis of politics, diplomacy and social history, see Tudor period. The Tudors descended on Henry VII's mother's side from John Beaufort, 1st Earl of Somerset, one of the illegitimate children
Tudors of Penmynydd the Great and later his son Dafydd ap Llywelyn. He claimed descent from Marchudd ap Cynan, Lord of Rhos and 'protector' of Rhodri the Great, king of Gwynedd, a founder of one of the so-called Fifteen Tribes of Wales. From Ednyfed's many sons would come a 'ministerial aristocracy' in northern Wales. He left the manors of Trecastell, Penmynydd and Erddreiniogin, Anglesey to those of his sons born to his second marriage to Gwenllian, daughter of king Rhys ap Gruffydd of Deheubarth, and among these sons was Goronwy (died 1268), founder of the line of the Tudors of Penmynyth. Goronwy served