Events
Date of Birth: unknown.
Place of Birth: unknown.
Date of Death: a few years after 1144.
The Complete Peerage (5:120) states that he was slain at the siege of Burwell Castle in August, 1144, but Cawley cites Domesday Descendants, which cites “a charter of St Neots which shows that William de Say survived his brother-in-law Geoffrey de Mandeville ‘by a few years’”.
Relationships
Father: unknown.
Mother: unknown.
Spouse: Beatrice de Mandeville (died 19 April, in or before 1197).
This relationship is given in the Complete Peerage (5:120).
Children:
William de Say (died shortly before 1 August 1177).
Geoffrey de Say (died shortly before 19 May 1214) married (1) Alice, daughter of John de Chesney and widow of Hugh de Periers; married (2) Alice de Ver.
References
Cawley, Charles. “William de Say” 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) Volume 5.