William le Vavasour, king's justice, held 2 knights' fees of the old feoffment of William de Percy II in 1166, and half a knight's fee also of the old feoffment of the honour of Skipton, the Percy lands held by Malger having been considerably extended and the Skipton lands in Craven having been acquired. In a charter to Bolton priory, 1175-90, with the consent of Robert and Malger his sons, he confirmed land in Yeadon of the gift of Robert son of Malger his uncle (avunculus). It can be deduced that William was a grandson of Malger the Domesday tenant, but it is uncertain whether this was paternal or maternal descent. The balance of evidence, including Dodsworth's statement that William's father was named Malger, suggests that Malger of the Survey had two sons Robert and Malger, William being the heir of Robert who presumably died without issue. William le Vavasour died in 1189-91. Robert, his elder son and successor at Hazlewood, had by his first wife a daughter who married Theobald Walter, ancestor of the Butlers later earls of Ormond, and had the manor of Edlington as part of her endowment; and by his second wife a son John le Vavasour.... 1
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Sir William le Vavasour, Knight, Lord of Hazelwood, who confirmed, in the reign of Henry I., the gift of his father to the monks of Salley. He was a Judge 30 Henry II., 1184; one of the witnesses to the charter
of the Abbey of Sawley, County York ; and held two knight's fees of Sir William de Percy in 1187. 2