Henry IV of England her marriage to the King of England was childless. By an unknown mistress, Henry IV had one illegitimate child: Henry IV of England Henry IV (15 April 1367 – 20 March 1413), also known as Henry Bolingbroke (), was King of England from 1399 to 1413, and asserted the claim of his grandfather, Edward III (himself a maternal grandson of Philip IV of France), to the Kingdom of France. Henry was born at Bolingbroke Castle in Lincolnshire. His father, John of Gaunt (1340-1399) (created 1st Duke of Lancaster in right of his wife), was the fourth son (third to survive
Blanche of England of Amadeo, Prince of Achaea, member of the House of Savoy, who bore him six children. Blanche's son Rupert (nicknamed "the English") died aged nineteen in 1426, unmarried and without issue. Blanche of England Blanche of England, LG (spring 1392 – 22 May 1409), also known as Blanche of Lancaster, was a member of the House of Lancaster, the daughter of King Henry IV of England by his first wife Mary de Bohun. Born at Peterborough Castle in Cambridgeshire, Blanche was the sixth of the seven children born during the marriage of Henry of Lancaster and his wife Mary de