Jean I d'Avêsnes, Seigneur d'Avesnes

1218 - 1257  (39 years)

• Name	Jean I d'Avêsnes
  	He was also the Seneschal of Frederick II, the Seigneur d'Etroen, and the Count of Hainault, Holland and Flanders. [2]
  Relationship	with Robert Alan Roy
  Birth	1 May 1218	Etraeungt, Nord, France (not found)   [2]
  Legal	1236 (17 years)  [2]
  The Pope declared him a bastard in 1236, as he was the son of a cleric. In 1244, he was legitimatized by the Emperor Frederick II.
  Death	24 Dec 1257  [1, 2]
  Burial	Aft 24 Dec 1257	Valenciennes, Nord, Hauts-de-France, France   [2]
  Oldest Known Ancestors	Paternal Line: Fasted I d'Oisy   d. After 1092 Maternal Line: Dangerose ,   b. Abt 1080
  Person ID, Branch	I8718	Boudreau Line
  Last Modified	5 Jul 2025

  
  

  Father	Sir Bouchard d'Avêsnes, Seigneur d'Avêsnes and d'Etroen,   b. Abt 1180   d. 1244, Etaeungt, Nord, France (not found) (Age 64 years)
  Mother	Margaret, Countess of Hainault and Flanders,   b. 2 Jun 1202, Constantinople (now Istanbul), Empire of the East d. 10 Feb 1280 (Age 77 years)
  Family ID	F3348	Group Sheet  |  Family Chart

  
  

  Spouse / Partner	Adelaide of Holland,   b. About 1225   d. 1284 (Age 59 years)
  Marriage	9 Oct 1246  [1, 2, 3]
  Age at Marriage	He : 28 years and 5 months - She : ~ 21 years and 10 months.
  Notes	The Directory of Royal Genealogy gives their marriage date as September 1246. [4]
  Children	+ 1. Jean II d'Avêsnes, Count of Hainault and Holland,   b. 1247, Brabant, Holland d. 22 Aug 1304 (Age 57 years)  [Father: Birth]  [Mother: Birth]
  Family ID	F3539	Group Sheet  |  Family Chart
  Last Modified	9 Jan 2022

  
  

• Event Map		Burial - Aft 24 Dec 1257 - Valenciennes, Nord, Hauts-de-France, France  = Link to Google Earth
  Pin Legend	: Address       : Location       : City/Town       : County/Shire       : State/Province       : Country       : Not Set

  
  

• Sources

  [S59] Weis, Frederick Lewis. Ancestral Roots of Sixty Colonists Who Came to New England Between 1623 and 1650 Fifth Editionif, (Baltimore, Maryland: Genealogical Publishing Co., 1982). [S60] Stuart, Roderick W. Royalty for Commoners, The Complete Known Lineage of John of Gaunt, Son of Edward III, King of England, and Queen Philippa Fourth Edition, (Baltimore, Maryland: Genealogical Publishing Company, 2002). [S63] von Redlisch, Marcellus Donald Alexander R. Pedigrees of Some of the Emperor Charlemagne's Descendants volume 1 , (Cottonport, Louisiana: Order of the Crown of Charlemagne, 1941). [S278] Directory of Royal Genealogical Data, (web: http://www3.dcs.hull.ac.uk/public/genealogy/royal/catalog.html).