The first stone castle is thought to have been built by Gospatric, Earl of Northumbria, after his exile from England, following the Harrowing of the North, by William the Conqueror after Gospatric took refuge at the court of Malcolm III of Scotland.
Ealdred's daughter, Aelfflaed, was the first wife of Siward, Earl of Northumbria and her son, and Ealdred's grandson, was Waltheof, Earl of Northumbria.
After the Norman conquest the manor of Markeaton which had been held by the Anglo-Saxon Siward, the Fairbairn Earl of Northumbria, was given to Hugh d'Avranches, 1st Earl of Chester, along with chevinetum, Mackworth and Allestree.
Her father was the last of the major Anglo-Saxon earls to remain powerful after the Norman conquest of England in 1066, and the son of Siward, Earl of Northumbria.
The village of Myddle was occupied by 1066, with a manor house for Siward, Earl of Northumbria completed in the 1050s.
However, it was left to another of Cnut's earls, Siward, to protect his earldom of Northumbria by consolidating English power in Scotland; at his death in 1055 he, not the king, was overlord of all the territory that the Kingdom of Strathclyde had annexed early the previous century.
Osbeorn (died c. 1054), given the nickname Bulax, was the son of Siward, Earl of Northumbria (died 1055).
He was sent to the north as earl from 1068 to 1069 after the deposition of Gospatric.
Stukeley's genealogical "researches" then turned up a descendant of Earl Waltheof, and therefore a rival claimant to the earldom, related to the lords of Kyme, whom he named as Robert Fitzooth, born in 1160 and dying in 1247: and he claimed that "Ooth" or Odo had become corrupted into "Hood".
Siward, Earl of Northumbria (d. 1055), Anglo-Scandinavian earl of Northumbria (also portrayed as a character in Shakespeare's Macbeth)
Other possible ideas are that in the 11th century after Siward, Earl of Northumbria killed the Dane Tosti, Earl of Huntingdon and his men, the deceased were buried in a field near London and a memorial church was subsequently built to honour the memory of the Danes.
Even if he had not died in 1055, Siward would be highly unlikely to have survived the aftereffects (Norman replacement of Saxon nobility) of Hastings; in Lukeman's play, Siward is still alive—and is one of two (the other being Seyton) who repeatedly advise Malcolm to move against Donalbain and Fleance
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Eadulf is primarily remembered for his involvement in the death of Walcher, Earl of Northumbria and Bishop of Durham.