Events
Date of Birth: unknown.
Place of Birth: unknown.
Date of Death: unknown.
Place of Death: unknown.
Relationships
Father: William Marshal, fourth earl of Pembroke.
This relationship is given by the Complete Peerage (4:197) and by Crouch (ODNB).
Mother: Isabel de Clare.
This relationship is given by the Complete Peerage (4:197) and by Crouch (ODNB).
Spouse: William de Ferrers, fifth earl of Derby.
This relationship is given by the Complete Peerage (4:197) and by Crouch (ODNB).
Children:
(Complete source citations for facts about the children on this page are currently outside of the scope of this project.)
Agnes (died 11 May 1290) married William de Vescy of Alnwick and Malton.
Isabel (died 11 November 1260) married Gilbert Basset of Wycombe.
Maud (died 12 March 1298/9) married (1) Simon de Kyme of Kyme; married (2) William Fort de Vivonne in Poitou, of Chewton; married (3) Aimery, vicomte of Rochechouart in Poitou.
Sibyl married Frank de Bohun of Midhurst.
Joan married (1) John de Mohun; married (2) Robert Aguillon of Watton and Perching.
Agatha (died 22 May 1306) married Hugh de Mortimer of Chelmarsh.
Alianore (died 26 October 1274) married (1) William de Vaux of Tharston and Wisset; married (2) Roger de Quency, earl of Winchester; married (3) Roger de Leyburne of Elham.
References
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).
Crouch, David. William Marshal: Court, Career and Chivalry in the Angevin Empire 1147-1219 (London: Longman, 1990).