 One reason advanced for supposing that John of Worcester may have been mistaken in naming this woman Ealdgyth is that Sigeferth's brother Morcar had also been married to a woman named Ealdgyth.This Ealdgyth was the daughter of Ælfthryth, and niece of Ælfhelm, Ealdorman of York and Wulfric Spot.While Ealdgyth is a common female name in the period, this coincidence has raised the suspicion that the Worcester chronicler has confused Sigeferth's widow with his sister-in-law.