Eadulf or Eadwulf Rus was an 11th-century Northumbrian noble. He was either the son or grandson of Gospatric, possibly the man who soon after Christmas 1064 was allegedly killed on behalf of Tostig, Earl of Northumbria. This murder by Tostig led to a great northern revolt against Edward the Confessor, a revolt that turned both King Edward and Harold Godwinson against Tostig and led to the appointment of the Mercian, Morcar, as Earl of northern England.