Events
(supposed) Date of Birth: 9 October 1200.
(supposed) Place of Birth: Pembroke Castle.
The date and place are given by Cawley. This discussion at soc.genealogy.medieval raises suspicions that the exact date and place are errors.
Date of Death: 17 January 1240.
The date is given by Archer (ODNB).
Place of Death: Berkhamstead Castle, Hertfordshire.
The place is given by Cawley.
Place of Burial: Beaulieu.
The place is given by Archer (ODNB).
Relationships
Father: William (I) Marshal (about 1146 - 1219), earl of Pembroke.
This relationship is given by Crouch (ODNB) and by the Complete Peerage (10:364 a).
Mother: Isabel de Clare (died 1220), countess of Pembroke.
This relationship is given by Crouch (ODNB) and by the Complete Peerage (10:364 a).
Spouse: Gilbert de Clare (about 1180 - 1230), earl of Gloucester and of Hertford.
This relationship is given by Archer (ODNB) and by the Complete Peerage (10:364 a).
Spouse: Richard (1209 - 1272), earl of Cornwall. Married March 1231.
This relationship is given by Archer (ODNB) and by the Complete Peerage (10:364 a).
Children:
(Complete source citations for facts about the children on this page are currently outside of the scope of this project. Most information below comes from Cawley.)
Amicia de Clare (1220 - 1283) married Baldwin de Reviers, earl of Devon.
Richard de Clare (1222 - 15 July 1262), earl of Gloucester and of Hertford, married (1) Margaret, daughter of Hubert de Burgh; married (2) Maud, daughter of John de Lacy, earl of Lincoln in 1238.
Agnes de Clare.
Isabel de Clare (2 November 1226 - after 10 July 1264) married Robert (V) de Brus of Annandale.
William de Clare (18 May 1228 - July 1258).
Gilbert de Clare (12 September 1229 - after 1244).
References
Archer, T.A.. “Clare, Gilbert de, fifth earl of Gloucester and fourth earl of Hertford (c. 1180-1230)”, rev. Michael Altshul, in the Oxford Dictionary of National Biography (Oxford University Press, 2004; online edn, October 2005).
Cawley, Charles. “Isabel” 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. “Marshal, William (I), fourth earl of Pembroke (c. 1146-1219)” in the Oxford Dictionary of National Biography. (Oxford University Press, 2004).