Events
Date of Birth: unknown.
Place of Birth: unknown.
Date of Death: 1147.
This date is given by Crouch (ODNB).
Relationships
Father: Hugues I "le Grand", count of Vermandois.
This relationship is given by Crouch (ODNB), by Keats-Rohan (p. 767), and by the Complete Peerage (12/1:496).
Mother: Adélaïde, daughter of Herbert, count of Vermandois and of Valois.
This relationship is given by the Complete Peerage (12/1:496) and by Crouch (1986, pp. 11-12).
Spouse: Robert de Beaumont (died 1118), count of Meulan and first earl of Leicester. Married in about 1101. Divorced 1115.
This relationship is given by Crouch (ODNB), by Keats-Rohan (p. 767), and the Complete Peerage (10:351).
Spouse: William (II) de Warenne (died 1138). Married 1118 or 1119.
This relationship is given by Hollister (ODNB), by Keats-Rohan (p. 767), and by the Complete Peerage (12/1:496).
Children (by Robert):
(Complete source citations for facts about the children on this page are currently outside of the scope of this project.)
Waleran de Beaumont (1104 - 9 or 10 April 1166), count of Meulan, married Agnes de Montfort in 1141.
Robert de Beaumont (1104 - 5 April 1168), earl of Leicester, married Amice de Gaël.
Isabella married Gilbert fitz Gilbert de Clare, earl of Pembroke. Isabella was a mistress of king Henry I.
Hugh de Beaumont married a daughter of Simon de Beauchamp.
Adeline de Beaumont married Hugues (IV), lord of Montfort-sur-Risle.
Aubrey de Beaumont married Hugues (II), lord of Châteauneuf-en-Thimerais.
Mathilde de Beaumont married Guillaume, lord of Ivry.
Children (by William):
William (III) de Warenne (about 1119 - 1148). Earl of Surrey. Married Ela, daughter of Guillaume Talvas, count of Ponthieu.
Gundreda married (1) Roger de Beaumont, earl of Warwick; married (2) William de Lancaster.
Ralph de Warenne.
Reginald de Warenne (1121x6- 1178/9) married Alice, daughter of William of Wormegay.
Ada de Warenne (about 1123 - 1178) married Henry of Scotland, earl of Northumberland, in 1139.
References
Cawley, Charles. “Isabelle de Vermandois” in Medieval Lands: A prosopography of medieval European noble and royal families.
Cokayne, George Edward, and Vicary Gibbs; et al. The complete peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, extant, extinct, or dormant [2nd ed.]. (London: St. Catherine Press, 1910-59).
Crouch, David. The Beaumont Twins: The Roots and Branches of Power in the Twelfth Century (Cambridge University Press, 1986).
Crouch, David. “Beaumont, Robert de, count of Meulan and first earl of Leicester (d. 1118) in the Oxford Dictionary of National Biography. (Oxford University Press, 2004).
Hollister, C. Warren. “Warenne, William (II) de, second earl of Surrey (d. 1138)” in the Oxford Dictionary of National Biography. (Oxford University Press, 2004).
Keats-Rohan, Katharine S. B. Domesday Descendants: A Prosopography of Persons Occurring in English Documents 1106 - 1166. (Woodbridge: 2002).