Guillaume I de Fiennes

Abt 1180 - Bef 1240

• Name	Guillaume I de Fiennes
  Birth	Abt 1180  [1]
  Gender	Male
  Alternate death	Between 1233 and 1240  [1]
  Alternate death	1241  [2]
  Death	Bef Jul 1240  [3]
  Person ID	I13055	Ancestry of PNH, TNH, and others | Ancestor of AP, Ancestor of DDB, Ancestor of GR, Ancestor of KL, Ancestor of LD, Ancestor of LDN, Ancestor of LMW, Ancestor of TNH, Ancestor of TSW, Ancestor of TWK
  Last Modified	16 Jun 2026

  
  

  Father	Enguerrand de Fiennes,   b. of Fiennes, Pas de Calais, France d. 1189, Acre, Palestine
  Mother	Sibyl of Boulogne   d. Abt 1208
  Marriage	Bef 1171  [2]
  Family ID	F8193	Group Sheet  |  Family Chart

  
  

  Family	Agnès de Dammartin,   b. Abt 1185   d. Aft 1244 (Age > 60 years)
  Marriage	Bef 1 Jan 1204  [3]
  Children	+ 1. Enguerrand de Fiennes,   b. Bef 1205   d. 1269 (Age > 64 years) + 2. Mahaut de Fienes,   b. Abt 1205
  Family ID	F8192	Group Sheet  |  Family Chart
  Last Modified	16 Jun 2026

  
  

• Notes

  Seigneur of Fiennes in Pas de Calais; lord of Wendover.

  
  

• Sources

  [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler. [S1526] The Ancestry of Dorothea Poyntz, Wife of Reverend John Owsley, Generations 1-15, Fourth Preliminary Edition, by Ronny O. Bodine and Bro. Thomas Spalding, Jr. 2013. [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.