The Invincible Magazine, Vol. 1, No. 5, p. 26, says that the inscription on Gundred's tombstone describes her as wife of William de Warren and daughter of Wm., the Conqueror. Also in Burke's Dormant and Extinct Peerage, pp. 154, 568 and 588, she is called daughter by Wm., the Conqueror, in a charter signed by Wm., William de Warren and Henry I, son of William, the Conqueror. Thus proving this much discussed question. E. E. W.) For the important part that William de Warren took in the Conquest of England he received 300 lordships in the counties of Salop, Essex, Suffolk, Oxford, Hants, Cambridge, Bucks, Norfolk, Lincoln and York.53735

1st Earl of Surrey53735

Pg 688 Pedigree: William de Warenne, cr. Earl of Surrey or Warenne ? 108854947

Pedigree of the Family of Warren-William De Warren, the first Earl Warren & Surrey60932
Pg 18 of 135 Gundreda (sic) was highly religious and excellent person, and no doubt it was partly through her influence that her husband was let to endow a great number of religious edifices.

Pg 106 Line 158, William de Warenne, created 1st Earl of Surrey17385

Pg 112, 31. William de Warenne, was given by Duke William the castle of Mortemer, which had been forfeited by his kinsman, Roger de Mortimer (Mortimer 33), after the battle of Mortemer (sic) 1054; took part in the Battle of Hastings, and was rewarded with lands in 13 counties; created Earl of Surrey 16 Apr 1088; was mortally wounded at the siege of Pevensey17386

Pg 62 William De Warenne, created Earl of Surrey 16 Apr 1088. Abt 1054, Duke William gave him the castle of Mortimer which had been forfeited by his kinsman, Roger De Mortimer, after the Battle of Mortimer in February of that year. He was summoned to a Council by Duke William, on hearing that Harold had been crowned King of England. He took part in the invasions of England and was present at the Battle of Hastings. He was awarded lands in thirteen counties and in 1067 was one of the Norman nobles whom William I, left in England to support the vice-gerents, William Fitz Osbern and the Bishop of Bayeux. In 1075, he crushed the rebellion of the Earls of Hereford and Norfolk54948

p.1484 The ancestor of perhaps all the English, Scotch and Irish families of Warren was William de Warrenne, who came to England with William the Conqueror, and was related to him both by marriage and descent. He had a considerable command at the battle of Hastings, and on account of his valor and fidelity obtained immense grants of land from the Conqueror. He had lands in Shropshire, Essex, Suffolk, Oxford, Hants, Cambridgeshire, Bucks, Huntington, Bedfordshire, Norfolk, Lincoln and Yorks, amounting in all, according to Hume, to three hundred lordships.
He became the first Earl of Warren and Surrey. His wife Gundreda, daughter of William (1) and descendant of Charlemagne80671

Pg 141 Warren: 5. William (2) De Warren, became the first Earl of Warren and Surrey, in England54949

Vol 2 Image214of360 William de Warren, Earl of Warren17388

Pg 111 14. Gundred Marr: William, Earl of Warren, in Normandy, created Earl of Surrey in England72277

Pg 319 William De Warren, took so important a part in the battle of Hastings that the Conqueror gave him lands in almost every county in England; he became the first Earl of Warren84372

Image126of277 Pg 117 William De Warrenne, Earl of Warrenne, in Normandy, and Earl of Surry in England, a near kinsman of William I, the Conqueror, came into England with that prince, and having distinguished himself at the battle of Hastings, obtained an immense portion of the public spoliation.60934

Appendix Pg 1168 William De Warren, 1st earl of Surry85158

William De Warenne 1st Earl of Surrey, Male, Norman Nobleman Who was Created Earl of Surrey Under William II “Rufus”25401

Pg 106 Line 158, William de Warenne s/o Rudolf de Warenne and Beatrice17385 (Father Rudolf? Mother Beatrice?)