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]
  Birth	1 May 1218	Étrœungt, Nord, Hauts-de-France, France   [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]
  Patriarch & Matriarch	Fasted I d'Oisy   d. After 1092  (4 x Great Grandfather)  Dangerose,   b. Abt 1080  (4 x Great Grandmother)
  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, Étrœungt, Nord, Hauts-de-France, France (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] ▻ Philippa of Luxemburg  m. 1270
  Family ID	F3539	Group Sheet  |  Family Chart
  Last Modified	9 Jan 2022

  
  

• Pedigree

  ← Click to display 1Jean I d'Avêsnes, Seigneur d'Avesnes(1218 – 1257) 2Sir Bouchard d'Avêsnes, Seigneur d'Avêsnes and d'Etroen(Abt 1180 – 1244) 4Jacques d'Avêsnes, Seigneur d'Avêsnes, Leuze, Conde and Guise(Abt 1150 – 1191) 8Nicholas d'Avêsnes, Lord d'Avêsnes, Leuze and Conde( – 1171) 16Walter I d'Oisy, Lord of Avêsnes and Leuze 17Ada of Mortagne 9Mathilda de la Roche 18Henry I, Lord de la Roche( – 1138) 19Mathilde of Limburg 5Adele de Guise(1155 – ) 10Bernard, Seigneur de Guise 20Gui, Seigneur de Guise( – 1141) 21Adelaide de Montmorency 11Adelaide 22 23 3Margaret, Countess of Hainault and Flanders(1202 – 1280) 6Baldwin VI, Count of Hainaut and Latin Emperor of Constantinople(1171 – 1205) 12Baldwin V, Count of Hainaut and Namur(1150 – 1195) 24Baldwin IV, Count of Hainaut(1099 – 1171) 25Alice de Namur(1115 – 1169) 13Marguerite of Lorraine(1148 – 1194) 26Dietrich von Lothringen II, Count of Alsace and Flanders(1101 – 1166) 27Sybil of Anjou(1112 – 1165) 7Marie of Champagne, Empress of Constantinople(1174 – 1204) 14Henry I, Count of Champagne and Brie(1126 – 1181) 28Theobald IV, Count of Blois and Champagne(1090 – 1152) 29Mathilda von Sponheim( – 1161) 15Marie of France, Princess of France(1145 – 1198) 30Louis VII, King of France(1120 – 1180) 31Eleanor of Aquitaine, Dutchess of Aquitaine(1123 – 1204)

  
  

• Event Map		Birth - 1 May 1218 - Étrœungt, Nord, Hauts-de-France, France 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 🟢 Primary Evidence 🟡 Secondary Evidence 🟠 Tertiary Evidence 🔴 Unreliable Evidence

  [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).