From Robert were descended the territorial lords of Cottingham, whose male line terminated in the 17th of Henry III [1233]. [John Burke & John Bernard Burke, Extinct and Dormant Baronetcies of England, Ireland, and Scotland, Second Edition, Scott, Webster, & Geary, London, 1841, p. 486, Skipwith, of Newbold Hall]
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The family of Skipwith, originally written Schypwyc, denominated from a town and lordship so called in the East Riding of York, descends from Robert de Estoteville, Baron of Cottingham, in the time of the Conqueror, of whom and his descendants, the feudal lords of Cottingham, Dugdale treats at great length in the Baronage. [John Burke & John Bernard Burke, Extinct and Dormant Baronetcies of England, Ireland, and Scotland, Second Edition, Scott, Webster, & Geary, London, 1841, p. 486, Skipwith, of Newbold Hall]
Note: The above source has Patrick de Skipwith descending from Robert's father (also Robert). Burke's Peerage indicates that Patrick was a younger son of this Robert.