King Henry I confirmed the Barony of Graystock unto Phorne, son of the said Lyulphe, whose posterity took their surname from the place, and were called de Greystock. Phorne was s. by his son Ivo. [Sir Bernard Burke, Dormant and Extinct Peerages, Burke's Peerage, Ltd, London, 1883, p. 254, Greystock, Barons Greystock]
Title: Ancestral Roots of Certain American Colonists, 7th Edition, by Frederick Lewis Weis, additions by Walter Lee Shippard Jr., 1999 Page: 138-24 Text: Forn (no last name)