Henry IV of England 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 to adulthood) of King Edward III and enjoyed a position of considerable influence during much of the reign of
John IV, Duke of Brittany all of John's children. After his death, she served as Regent to their son, John V, Duke of Brittany, and eventually married King Henry IV of England. John IV, Duke of Brittany John IV the Conqueror KG (in Breton Yann IV, in French Jean IV, and traditionally in English sources both John of Montfort and John V) (1339 – 1 November 1399) was Duke of Brittany and Count of Montfort from 1345 until his death and 7th Earl of Richmond from 1372 until his death. He was the son of John of Montfort and Joanna of Flanders. His father claimed