Who was the son of Waltheof I that was killed by Thurbrand the Hold?
Thurbrand the Hold:  Perhaps based in Holderness and East Yorkshire, Thurbrand was recorded as the killer of Uhtred the Bold, Earl of Northumbria. Uhtred the Bold:  He was the son of Waltheof I, ealdorman of Bamburgh, whose ancient family had ruled from the castle of Bamburgh on the Northumbrian coast.
Uhtred the Bold