John Cornwall, 1st Baron Fanhope and Milbroke, KG, PC, also known as Sir John Cornwall, Sir John Cornwaille and Sir John Cornouayl (c. 1364 – 11 December 1443), was an English nobleman, soldier and one of the most respected chivalric figures of his era. Early life Sir John was the son of Sir John Cornewaille, who had been in service to John V, Duke of Brittany, and his wife, a niece of the Duke of Brittany. He was born aboard a ship which was docked in Mount's Bay, in Cornwall, and baptised at Marazion, in England. Family In 1400, Sir John married the widowed Elizabeth of Lancaster, Duchess of Exeter. Elizabeth was the daughter of John of Gaunt, the third surviving son of King Edward III of England, and the sister of Henry IV of England. She had previously been married to John Holland, 1st Duke of Exeter, with whom she had six children. John Holland was executed for conspiring to assassinate Henry IV during the Epiphany Rising. Sir John's marriage to Elizabeth caused some scandal as he failed to ask the king for permission to marry his sister, which resulted in Sir John's arrest. Their marriage was a happy and loving one. Sir John and Elizabeth had a son and daughter together. The former, John Cornewaille, was born in 1403 and died in December 1421. Young John Cornewaille was only seventeen when he was killed at the Siege of Meaux. He died next to his father, who witnessed his son's head being blown off by a gun-stone. Sir John was deeply affected by witnessing the death of his son and heir, and vowed never to wage war on Christian princes. The couple's daughter was Constance Cornwall, who married John FitzAlan, 14th Earl of Arundel, and died in 1427. Neither of Sir John's children had any children of their own. Sir John was a father of two illegitimate sons by a "Mistress Ewen", John and Thomas, whom he recognised in his will. Elizabeth died on 24 November 1425 and was buried at St Mary's Church, Burford, Shropshire, England. Peerage and military career Sir John excelled in combat and was victorious in numerous tournaments, defeating many other knights in mêlée combat. During the Middle Ages, tournaments were regarded as the greatest test of a warrior's skill and valour; an idea reinforced by the prominent place that it occupied in popular Arthurian