Guillaume I de PONTHIEU, Count de Montreuil^{[1, 2, 3, 4]}

Abt 915 - 980  (65 years)

• Name	Guillaume I de PONTHIEU
  Suffix	Count de Montreuil
  Birth	Abt 915	Ponthieu, FRANCE
  Gender	Male
  Death	980
  Person ID	I27665	Coombs
  Last Modified	10 Jan 2021

  
  

  Father	Herbouin II ou Hélouin de PONTHIEU, Count,   b. Abt 890, Ponthieu, Alencon, Normandy, France d. 13 Jul 945, Bayeux, 14400, Calvados, FRANCE (Age 55 years)
  Mother	Noelle de DAMMARTIN,   b. Abt 895   d. Yes, date unknown
  Family ID	F9745	Group Sheet  |  Family Chart

  
  

  Family 1	Mathilde de GAMACHES,   b. Abt 910   d. Abt 959 (Age 49 years)
  Children	1. Arnoul II ou Ernicule I de BOULOGNE, Count of Boulogne,   b. Abt 930   d. Aft 972 (Age > 43 years)
  Family ID	F9744	Group Sheet  |  Family Chart
  Last Modified	2 Feb 2026

  
  

  Family 2	Maude [Vlaanderen] de SAINT POL, DE ST. POL SUR MER (L) DE THEROUENNE,   b. Abt 915, Therouenne, Artois/Pas de Calais, France d. Yes, date unknown
  Family ID	F9750	Group Sheet  |  Family Chart
  Last Modified	2 Feb 2026

  
  

• Notes

  Profession : Comte de Ponthieu. Certaines sources donnent Rotgaire de MONTREUIL, son frère. Profession : Comte de Ponthieu. Certaines sources donnent Rotgaire de MONTREUIL, son frère.

  
  

• Sources

  [S33] http://vandermerwede.net/. [S13] bright.ged. [S54] jean-pierre_masson. [S23] AUREJAC.GED.