Sweyn II of Denmark
Waltheof initially submitted to William I and was allowed to keep his lands. He took part in a failed uprising to support the 1069 invasion by Sweyn II of Denmark and Edgar Ætheling (including an attack on York), but then once again submitted to William and was married to Judith of Lens, the King's niece. However, after taking part in a conspiracy against William in 1075 Waltheof was executed.