Guillaume de Fiennes

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ChartsAncestors of Adele La Force
Ancestors of Harriet Hanson Robinson
Guillaume de Fiennes, son of Sir Engurerrand de Fiennes, Knt. and Sibyl of Boulogne, was born say 1170.1 He died before 4 July 1240.1

Guillaume married (1) Isabel (…), whose ancestry is unknown (or not traced here);1 he married (2) Agnès de Dammartin, daughter of Aubrey II, Count of Dammartin-en-Goële and Mathilde of Clermont, before 1 January 1204.1

Family 1

Isabel (…) d. bef. 1204

Family 2

Agnès de Dammartin d. aft. 1244
This person was last edited on19 Apr 2021


  1. [S1947] Douglas Richardson, Royal Ancestry: A Study in Colonial and Medieval Families, Five vols. (Salt Lake City, Utah: s.p., 2013), 1:469 (Boulogne 7), further cited as Richardson, Royal Ancestry.