Commentary
Baldwin shows her father as Richard, Count of Evreux. He references Book VII and VIII of Robert of Torigny's additions to the "Gesta Normannorum Ducum" as evidence to support this. The GND was written in about 1070/1 and Robert of Torigny's additions were added in 1139. The GDN was therefore a contemporary work for this period. For a discussion on the importance of this work, see "The Anglo-Norman Studies: Proceedings of the Battle Conference 1980", pp 106-118, "The Gesta Normannorum Ducum, A History Without End, Elisabeth, M. C. Van Houts [ http://books.google.com/books?id=nYf4GwsrIZ4C&pg=PA106 ].

Baldwin shows her mother as Godehilde. He references "The Ecclesiastical History of Orderic Vitalis", Volume 3 where it states that Agnes was uterine sister of Ralph de Tosny.
Family
ClaimDetailEvidence
FatherRichard, 3rd Count of Evreux (e990-1067) [S756] [S775:XIIa.753] [S905] [S956]
research
MotherGodeheut (e991-) [S905] [S956]
research
SpouseSimon de Montfort I, Seigneur of Montfort L’Amaury (e1030-~1087) 
Child +Amaury de Montfort [III] Comte d’Evreux (e1071-1138) [S956]
research
Child +Bertrade de Montfort (e1071-1116) [S756] [S956]
research
Attributes
ClaimDetailEvidence
GenderFemale
NameAgnes d'Evreux [S756] [S905] [S956] [S1441]
research
NameAgnes [S775:XIIa.753]
research
FatherRichard, 3rd Count of Evreux (e990-1067) [S756] [S775:XIIa.753] [S905] [S956]
research
MotherGodeheut (e991-) [S905] [S956]
research
Timeline
ClaimDateDetailAgeEvidence
Birthest 1031
 
Marriagebef 1070Simon de Montfort I, Seigneur of Montfort L’Amaury (e1030-~1087) [S956]
research
Sources
IndexTitle
[S756] Weis, Frederick Lewis, "Ancestral Roots of Sixty Colonists Who Came To New England before 1700, 7th Ed." (Genealogical Publishing Co., Inc., Baltimore, 1999).
[S775] George Cokayne, "Complete Peerage" (https://dcms.lds.org/delivery/DeliveryManagerServlet?dps_pid=IE83409).
[S905] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Normandy: Alencon, Evereux, Meulan, Perche)" (2006-7 (v1.1 Updated 02 March 2007)) (https://fmg.ac/Projects/MedLands/NORMANDY NOBILITY.htm).
[S956] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Paris Region: Beuamont, Beauvais)" (2006-7 (v1.1 Updated 19 October 2006)).
[S1441] Baldwin, Stewart, "The Henry Project - Agnes d'Évreux" (undated (site last updated June 20, 2010)) (https://fasg.org/projects/henryproject/data/agnes000.htm).