Charles IV of France
In 1328, Charles IV of France died without sons or brothers and a new principle disallowed female succession. Charles's closest male relative was his nephew Edward III of England, whose mother, Isabella, was Charles's sister. Isabella claimed the throne of France for her son by the rule of Proximity of blood, but the French nobility rejected this, maintaining that Isabella could not transmit a right she did not possess. An assembly of French barons decided that a native Frenchman should receive the crown, rather than Edward.