William I de Mandeville

- Bef 1116

• Name	William I de Mandeville  [1, 2, 3]
  Birth	of Great Waltham, Essex, England   [4]
  Gender	Male
  Death	Bef May 1116  [4]
  Alternate death	Bef 1130  [2, 5, 6]
  Person ID	I881	Ancestry of PNH, TNH, and others
  Last Modified	3 Oct 2020

  
  

  Father	Geoffrey I de Mandeville,   b. of Manneville, Seine-Inferieure, Normandy, France d. Aft 1086
  Mother	Adeliza de Balts   d. Bef 1100
  Family ID	F592	Group Sheet  |  Family Chart

  
  

  Family	Margaret fitz Eudes
  Children	+ 1. Beatrice de Mandeville,   b. Abt 1105   d. Bef 19 Apr 1197, Rickling, Saffron, Essex, England (Age ~ 92 years)
  Family ID	F1209	Group Sheet  |  Family Chart
  Last Modified	14 Apr 2026

  
  

• Notes

  Also called William de Magnivil. Constable of the Tower of London, and thus keeper of the first person known to have been imprisoned there for political reasons, Ranulf Flambard.

  
  

• Sources

  [S875] Official site of Westminster Abbey. [S128] The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant ed. Vicary Gibbs, H. A. Doubleday, Duncan Warrand, Howard de Walden, Geoffrey H. White and R. S. Lea. 2nd edition. 14 volumes (1-13, but volume 12 spanned two books), London, The St. Catherine Press, 1910-1959. Volume 14, "Addenda & Corrigenda," ed. Peter W. Hammond, Gloucestershire, Sutton Publishing, 1998. [S2163] The Hundred of Launditch and Deanery of Brisley, in the County of Norfolk by G. A. Carthew. Norwich: Miller and Leavins, 1877. [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013. [S789] The Wallop Family and Their Ancestry by Vernon James Watney. Oxford, 1928. [S3215] Medieval Welsh Ancestors of Certain Americans by Carl Boyer III. Santa Clarita, California, 2004.