A wikipedia entry suggests that this profile's father was William Meschin.
William had several marriages. His first marriage was over, presumably through death, by the year 1137, when he married Alice de Rumilly, daughter of William Meschin. By the latter, he had a son, also called William (William of Egremont or William the Atheling), who died in 1160, and a daughter Cicely, Lady of Skipton, who married William le Gros, 1st Earl of Albemarle. https://en.wikipedia.org/wiki/William_fitz_Duncan