Gilbert I de Neville; held in the year 1086 carucates (a carucate was an area of land that could be cultivated by an eight-ox plough team throughout a single year) at Waltcot, Lincolnshire adn Yawthorpe, together with others in that part of England by 1115-18; kinship is plausible but has not been provern with [son Geoffrey]. [Burke's Peerage]
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A reported Companion in arms to William the Conqueror, and by some genealogists, Admiral of the fleet of William the Conqueror.
On the spelling of the surname Neville: The Abergavenny branch reject the final "e", while the Braybroooke branch retain it. For the sake of further distinction, the Grove, Chevet, Holbeck, Skelbrooke and Willingore baranchs omit one "L". In the old manuscripts, from "De Nova Villa", we get Neuville, Nevylle, Nevyll, Nevyl, Nevill and Nevil while the Latimers are frequently styled Nevell, but the prevailing form is Nevyll or Nevill.
William the Conqueror was the bastard son of Robert the Devil, Duke of Normandy, and Harlotta (or Arlette) daughter of a tanner of Falaise. Richard de Nova Villa was a cousin of the Conqueror on his maternal side and he left four sons; Gilbert, Robert, Richard and Ralph. From Gilbert de Nevill descends the houses of Westmoreland, Warwick, Latimer and Abergavenny. Gilbert de Nevill is claimed by some to have been the Admiral of the of the Conqueror's fleet, an uncle of Gilbert, Foulk d'Anou furnished 40 ships for the fleet.
The Norman family of Nevill came from Teutonic stock. Baldric Teutonicus was Lord of Bacqueville en Caux under Duke William. He married a niece of Gilbert Compte de Brionne, a grandson of duke Richard I who was regent of Normandy in 1040. The fourth son of Baldric Teutonicus was called Richard de Nova Villa, or de Neuville from his fife in Neuville sur Tocque in the department of the Orne, arrondissement of Argenton, and the canton of Grace. His sister, Hawisia, married Robertr Fitz Erneis who was slain at Hastings on October 14, 1066.
Evidently there is some evidence from one of Alan's charters granting some land to Kirkstead Abbey was given in the presence of the bishop of Lincoln and witnessed by Alan's brother Gilbert and Gilberts son Geoffrey. Source: B.L., Cotton Mss., Verpasian EXVIII, f. 159v, Gilbert is identified as his brother by Alan in Harley Charters 58 H4
There is evidently a witness list of one of Gilberts charters that names his two sons William and Walter and includes Alan, son of Ernise