Events
Date of Birth: unknown.
Place of Birth: unknown.
Date of Death: 22 September 1247.
Place of Death: unknown.
The date is given by the Complete Peerage (4:196).
Relationships
Father: William de Ferrers, third earl of Derby.
This relationship is given by the Complete Peerage (4:194).
Mother: Sibyl, daughter of William de Briouze, lord of Bramber.
This relationship is given by the Complete Peerage (4:194) and Keats-Rohan (p. 228). Phillips (DERBY) notes that despite a spurious charter referred to by the CP 14, the identification of Sibyl is sound.
Spouse: Agnes, daughter of Hugh, earl of Chester. Married 1192.
This relationship is given by the Complete Peerage (4:196; 5:pedigree chart after p. 320). It is recorded in several fines: 17 Henry III (no. 66); 18 Henry III (no. 397); 19 Henry III (no. 17); 19 Henry III (no. 20); 23 Henry III (no. 75); 31 Henry III (no. 511); 32 Henry III (no. 26); 32 Henry III (no. 28).
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.)
William de Ferrers (died 29 March 1254), fifth earl of Derby, married (1) Sibyl Marshal; married (2) Margaret de Quency.
Thomas Ferrers of Chartley.
Hugh Ferrers of Bugbrooke married a daughter of Roger de Mohaut.
Agnes married John de Vespont, lord of Westmorland.
References
Cawley, Charles. “WILLIAM de Ferrers” 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).
Henry III Fine Rolls Project. The National Archives and King’s College London (accessed 14 March 2015)
Keats-Rohan, K.S.B. Domesday Descendants (2002).
Phillips, Chris. “Some corrections and additions to the Complete Peerage.”