Edmund Ironside (c. 990 – 30 November 1016; Old English: Eadmund, Latin: Edmundus; sometimes also known as Edmund II was King of the English from 23 April to 30 November 1016]. He was the son of King Æthelred the Unready and his first wife, Ælfgifu of York. Edmund's reign was marred by a war he had inherited from his father; his cognomen 'Ironside' was given to him 'because of his valour' in resisting the Danish invasion led by Cnut the Great.
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According to the 12th century chronicle of John of Worcester, Sigeferth and Morcar were the sons of one Earngrim who is otherwise unrecorded. The Seven Burghs of which they were said to be the chief men are believed to have been the Five Burghs-Derby, Leicester, Lincoln, Nottingham and Stamford-together with Torksey and York. These were among the chief towns of the northern part of the Danelaw.
Sigeferth was murdered alongside his brother Morcar by Eadric Streona at Oxford in 1015.
King Æthelred seized both Morcar's and Sigeferth's lands, and imprisoned Sigeferth's widow who was called Ealdgyth. King Edmund Ironside seized the widow and married her. Edmund redistributed some of the lands that had previously belonged to Sigeferth.
