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
Henry IV of England and France". Upon his accession as king, Henry updated the arms of the kingdom to match an update in those of royal France – from a field of fleur-de-lys to just three. When Richard II was forced to abdicate the throne in 1399, Henry was next in line to the throne according to Edward III's entailment of 1376. That entailment clearly reflects the operation of agnatic primogeniture, also known as the Salic law. At this time, it was by no means a settled custom for the daughter of a king to supersede the brothers of that king in the line