William de Warren married Gundred, 4th daughter of William, theConqueror, and his wife Matilda of Flanders. (It has been said thatGundred was not the daughter of William, the Conqueror, but that she wasthe daughter of Matilda of Flanders by, perhaps, a previous marriage. TheInvincible Magazine, Vol. 1, No. 5, p. 26, says that the inseription onGundred's tombstone describes her as wife of William de Warren anddaughter of Wm., the Conqueror. Also in Burke's Dormant and ExtinctPeerage, pp. 154, 568 and 588, she is called daughter by Wm., theConqueror, in a charter signed by Wm., William de Warren and Henry I, sonof William, the Conqueror. Thus proving this much discussed question. E.E. W.) For the important part that William de Warren took in the Conquestof England he received 300 lordships in the counties of Salop, Essex,Suffolk, Oxford, Hants, Cambridge, Bucks, Norfolk, Lincoln and York.
Ancestry shown differs from that shown by Cokayne in "The CompletePeerage",
and follows "Aspects of Robert of Torigny's genealogies revisted";"Nottingham
Medieval Studies,xxxvii,1993,pp.21-27; as cited by A.B.Wilson andS.Baldwin
<abwilson@uclink2.berkeley.edu>. The Complete Peerage vol.XIIpI,p.493-495.