With the death of Edgar, however, the royal succession became problematic. Æthelred took power in 978 following the murder of his brother Edward, but England was then invaded by Sweyn Forkbeard, the son of a Danish king. Attempts to bribe Sweyn not to attack using danegeld payments failed, and he took the throne in 1013. Swein's son, Cnut, liquidated many of the older English families following his seizure of power in 1016. Æthelred's son, Edward the Confessor, had survived in exile in Normandy and returned to claim the throne in 1042. Edward was childless, and the succession again became a concern. England became dominated by the Godwin family, who had taken advantage of the Danish killings to acquire huge wealth. When Edward died in 1066, Harold Godwinson claimed the throne, defeating his rival Norwegian claimant, Harald Hardrada, at the battle of Stamford Bridge.