Events
Date of Birth: probably about 1101 or 1102.
The Complete Peerage (12/2:361) states that Roger was probably underage at his father’s death and obtained the earldom in 1123, before 15 April.
Date of Death: 12 June 1153.
The date is given by Crouch (ODNB).
Relationships
Father: Henry de Beaumont (died 1119, earl of Warwick.
This relationship is given by Crouch (ODNB), by Keats-Rohan (p. 240), and by the Complete Peerage (12/2:361).
Mother: Margaret, daughter of Geoffroy, count of Perche.
This relationship is given by Crouch (ODNB), by Keats-Rohan (p. 240), and by the Complete Peerage (12/2:361).
Spouse: Gundreda, daughter of William (II) de Warenne, earl of Surrey.
This relationship is given by Crouch (ODNB), by Keats-Rohan (p. 240), and by the Complete Peerage (12/2:362).
Children:
William, third earl of Warwick, married (1) Margery d’Eiville; married (2) Matilda de Percy.
Waleran, fourth earl of Warwick, married (1) Margery de Oilly; married (2) Alice de Harcourt.
Henry. [Cawley argues that Henry likely did not exist.]
Agnes married Geoffrey de Clinton.
References
Cawley, Charles. “Roger de Beaumont” 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. “Roger, second earl of Warwick (d. 1153) 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).