Gilbert I CRISPIN seigneur de Tillieres et Bec
- Born: Abt 990, Tillieres, Maine-et-Loire, Anjou/Pays-de-la-Loire, France
- Died: After 1046, Bec, Eure, Normandy, France
A manuscript history of the Crispin family, probably written by Miles Crispin, records that the first family member was "Gislebertus" who was the first named "Crispini" because of his erect hair. Guillaume II Duke of Normandy confirmed the donation of "ecclesias...in maris Constantini pagi..." made by "Roberto...Hunfredi...filio" to Saint-Wandrille by charter dated to [1035/53], subscribed by "Roberti filii Hunfredi, Rogeri fratris eius, Anscetilli, Willelmi filii Ricardi secundi Normannorum ducis, Rogerii filii Radulfi de Warethna, Rogerii filii Ragnulfi, Gilleberti Crispin, Willelmi Guiet".
Gilbert married Gunnora D' AUNOU, daughter of Baldric DE COURCY "the Teuton", seigneur de Courcy and Alix DE BRIONNE. (Gunnora D' AUNOU was born about 1010 in Aunou, Orne, Normandy, France.)