Guillaume I de Ponthieu, Comte de Ponthieu[1]
- 1171-
Name Guillaume I de Ponthieu Suffix Comte de Ponthieu Nickname Talvas Gender Male Died 30 Jun 1171 Person ID I14801 Dickinson Last Modified 4 Sep 2017
Father Robert de Montgommery, 3rd Earl of Shrewsbury , b. ca. 1052, d. After 1129, Wareham Castle, Wareham, Dorset 
(Age ~ 78 years) Relationship Birth Mother Agnès de Ponthieu, Comtesse de Ponthieu, d. After 6 Oct 1100 Relationship Birth Married Before 9 Sep 1087 Family ID F4554 Group Sheet | Family Chart
Family Helie de Bourgogne, Ctss of Tripoli, Ponthieu, b. 1080, d. 28 Feb 1141 (Age 61 years) Married ca. 1112 Children + 1. Ela de Ponthieu, d. 10 Dec 1174 Last Modified 17 May 2015 Family ID F4553 Group Sheet | Family Chart
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Sources - [S336463] Medieval Lands: A prosopography of medieval European noble and royal families, Charles Cawley, (Online: The Foundation for Medieval Genealogy at http://fmg.ac/Projects/MedLands/, 20XX), http://fmg.ac/Projects/MedLands/NORTHERN%20FRANCE.htm#GuillaumeIPonthieudied1171B.
- [S336463] Medieval Lands: A prosopography of medieval European noble and royal families, Charles Cawley, (Online: The Foundation for Medieval Genealogy at http://fmg.ac/Projects/MedLands/, 20XX), http://fmg.ac/Projects/MedLands/NORTHERN%20FRANCE.htm#GuillaumeIPonthieudied1171B.