John, King of England Normandy and Anjou until 1259, but John's continental losses and the consequent growth of Capetian power in the 13th century proved to mark a "turning point in European history". John's first wife, Isabel, Countess of Gloucester, was released from imprisonment in 1214; she remarried twice, and died in 1217. John's second wife, Isabella of Angoulême, left England for Angoulême soon after the king's death; she became a powerful regional leader, but largely abandoned the children she had had by John. John had five legitimate children, all by Isabella. His eldest son, Henry III, ruled as King of England for the
Isabella of Castile, Duchess of York Isabella of Castile, Duchess of York Isabella of Castile, Duchess of York (1355 – 23 December 1392) was the daughter of King Peter and his mistress María de Padilla (d. 1361). She accompanied her elder sister, Constance, to England after Constance's marriage to John of Gaunt, 1st Duke of Lancaster, and married Gaunt's younger brother, Edmund of Langley, 1st Duke of York. Isabella was the youngest of the three daughters of King Peter of Castile by his favourite mistress, María de Padilla (d.1361). On 21 September 1371 Edward III's fourth son, John of Gaunt, 1st Duke of Lancaster, married Isabella's