Henry IV (1367-1413), son of John of Gaunt; reigned 1399-1413; known as Henry Bolingbroke. He overthrew Richard II, establishing the Lancastrian dynasty. Henry V (1387-1422), son of Henry IV; reigned 1413-22. He renewed the Hundred Years War soon after coming to the throne and defeated the French at Agincourt in 1415. Henry VI (1421-71), son of Henry V; reigned 1422-61 and 1470-71. Henry VII (1457-1509), the first Tudor king; son of Edmund Tudor, Earl