Sir John Norreys (ca. 1547 – 3 July 1597), also frequently spelt John Norris, was an English soldier of a Berkshire family, the son of Henry Norris, 1st Baron Norreys a lifelong friend of Queen Elizabeth.The most acclaimed English soldier of his day, Norreys participated in every Elizabethan theatre of war: in the Wars of Religion in France, in Flanders during the Eighty Years' War of Dutch liberation from Spain, in the Anglo-Spanish War, and above all in the Tudor conquest of Ireland.