The sudden death of Edgar at the age of 33 led to a succession dispute between rival factions supporting his sons Edward and Ethelred (or Aethelred). The elder son Edward was murdered in 978 at Corfe, Dorset, by his seven-year-old half-brother's supporters.

 

Edward II 'The Martyr's position in the genealogical roll of the Kings of England © The British Library Board, Royal 14 B. VI