A list of the ancestors who were the "Companions" of William the Conqueror. A list of all of his proven companions is at Wikipedia: https://en.wikipedia.org/wiki/Companions_of_William_the_Conqueror
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Aimery IV, Viscount of Thouars b. 1030, d. 1093Eustace II, Count of Boulogne & Lens d. abt. 1088Beaumont, Robert de Sir, Count of Meulan b. abt. 1046, d. 5 Jun 1118Giffard, Walter I Lord of Longueville d. aft. 1086Gilbert, Richard Fitz b. bt 1030 - 1035, d. 1089 or 1090Grandmesnil, Hugh de d. 22 Feb 1098l'Aigle, Engenulf de d. 17 Oct 1066Malet, William d. 1071Mortain, Robert de, Count of Mortain b. 1031, d. 1095Toeni, Ralph III b. bt 1025 - 1030, d. 24 Mar 1101/2