the name of two kings of England. Edmund I (921–946), reigned 939–946. After succeeding Athelstan, Edmund spent much of his reign trying to win his northern lands back from Norse control. Edmund II (circa 980–1016), son of Ethelred the Unready; reigned 1016; known as Edmund Ironside. Edmund led the resistance to Canute’s forces in 1015, but was eventually defeated and forced to divide the kingdom with Canute. On Edmund’s death, Canute became king of all England.