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Following copied from Jerald L Chittenden, World Connect db=JerryC490, rootsweb.com:
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The importance of this family was founded by the marriage of Gilbert de Aton with Margerie, dau. and heiress of Warine de Vesci, a younger son of William de Vesci, Lord of Alnwick, co. Northumberland, through which alliance the Atons inherited, eventually, the extensive possessions of the great Barons de Vesci. Gilbert de Aton d. in the 19th of Henry III [1235], and was s. by his son, William de Aton. [Sir Bernard Burke, Dormant, Abeyant, Forfeited and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 15, Aton, Barons de Aton]