Information from, "The History of the Stanhope Family" by Michael Stanhope, 2007. Website as at July 2014:
http://stanhopefamilyhistory.webs.com

Michael writes, “Crispin de Bec [Ansgothus], also an important administrator of Normandy, married his second-cousin Heloise de Guines”.

Michael writes that Crespin-Ansgothus had five sons:
1. Gilbert Crispin I
2. Raoul de Bec
3. Hellouin de Bec, a.k.a. Herluin, 994 - 1078
4. Odo de Bec
5. Roger de Bonneville