John de Ros, 8th Baron de Ros (1396–1421), was an English noblemen. Events September 25 - Bayezid I defeats Sigismund of Hungary and John of Nevers at the Battle of Nicopolis. ... Events March 21 - Battle of Beaugé. A small French force surprises and defeats an English force under Thomas, Duke of Clarence, a brother of Henry V of England, in Normandy. ...

He was the eldest son of William de Ros, 7th Baron de Ros and Margaret Fitzalan. His mother was a daughter of John Fitzalan and Eleanor Maltravers. William de Ros, 7th Baron de Ros, KG (1369 – September 1, 1414) was Lord Treasurer of England. ... John Fitzalan (c. ... Eleanor Maltravers, Lady Arundel (~1345 - January 12, 1405, was an English noblewoman during the reigns of King Edward III of England and his successors. ...

He served as a soldier of Henry V of England during the Hundred Years' War. Six years after the Battle of Agincourt, John participated in the Battle of Beaugé. He was among the casualties along with his brother William de Ros, Thomas of Lancaster, 1st Duke of Clarence, the governor of Normandy and others. He was buried at the Belvoir Priory. A Norwegian soldier (a Corporal, armed with an MP-5) A soldier is a person who has enlisted with, or has been conscripted into, the armed forces of a sovereign country and has undergone training and received equipment to defend that country or its interests. ... Henry V Henry V, (August 9 or September 16, 1387 – August 31, 1422), King of England, son of Henry IV by Mary de Bohun, was born at Monmouth, Wales, in September 1387. ... A map of Europe in the 1430s, at the height of the Hundred Years War The Hundred Years War is the name modern historians give to what was actually a series of related armed conflicts fought over a 116-year period between the Kingdom of England and France, beginning in... The Battle of Agincourt was fought on October 25, 1415, Saint Crispins Day, in northern France as part of the Hundred Years War. ... Thomas of Lancaster, 1st Duke of Clarence (29 September 1388–22 March 1421) was the third son of King Henry IV of England and his first wife, Mary de Bohun. ...

He was married to Margaret Despencer but no children are known to have resulted from this marriage.