Bodin … is considered to be one of earl Alan's bastard brethren; for, as "Bardulf s brother," he is found witnessing, with him, the charter of Odo, the earl's chamberlain, to St. Mary's (Old Mon. i. 394), and Ribald and Bardulf—assumed to be the same Bardulf—are styled "fratres comitis," in the memorandum of the charter of earl Alan Rufus, giving the church of Swavcsey to the abbey at Angers (lb. 572). Be this as it may, Bodin obtained from the earl a greater estate than Ribald, and, strange to say, Bardulfs name does not occur in the Survey. The earl gave Bodin the manors of Thorfin, namely, Layton with soke rights, (Great-) Langton, where he had a hall, the well-known Rokeby, Romaldkirk, Ravensworth and thirteen others, besides Ulchil's manor in Broughton and Newsome, and Tori's in Bedale, which last was rated at 30s., formerly 20s. The Thoresby "Rotulus Genealogicus" says, 'Bodin in his old age, because he desired to serve God and quit the world, divided his lands between his brother Bardolf and Ribald the brother of earl Alan'; but, it is certain he was succeeded at Bedale, Melsonby, and some others, by Scolland, whose son, Brian ' lord of Bedale,' gave the church of Melsonby and the tithes of other places to Castle Acre priory in Norfolk (lb. 629). Bardulf, who was no doubt Bodin's brother, succeeded to others, and gave the church of Ravensworth to St. Mary's, where, in his old age, he took refuge as a monk. He left a son Acharis, the founder of a Cistercian house at Fore, in Wensleydale, which was removed afterwards to another site in Uredale, and became known as Jervaulx abbey. He was the ancestor of the Lords Fitz Hugh." [1]
[1] Alfred S. Ellis, "Biographical Notes on Yorkshire Tenants Named in Domesday Book. II The Under-tenants," Yorkshire Archeological and Topographical Journal 5 (1879), 289-330 at 295-6, [GoogleBooks].