The eldest son of Henry IV became king in 1413
[DOC] [TLE] Henry IV | king of England | Britannica.com [PAR] Nov 6, 2015 ... King of England from 1399 to 1413, the first of three 15th-century monarchs from 
... Henry was the eldest surviving son of John of Gaunt, duke of ... Richard 
surrendered to him in August; Bolingbroke's reign as King Henry IV... [DOC] [TLE] Henry IV facts, information, pictures | Encyclopedia.com articles ... [PAR] Henry IV (13661413), king of England (13991413).