Jean I d'Avesnes (1218-1257) was born 1 May 1218 in Houffalize, Belgium to Bouchard IV d'Avesnes (1182-1244) and Margaret II, Countess of Flanders (1202-1280) and died 24 December 1257 in Valenciennes, France of unspecified causes. He married Aleid van Holland (bef1234-1284) 1246 JL . Notable ancestors include Charlemagne (747-814), Alfred the Great (849-899), William I of England (1027-1087), Hugh Capet (c940-996). Ancestors are from Germany, France, the United Kingdom, Belgium, the Netherlands, Italy.


Offspring of Jean I d'Avesnes and Aleid van Holland (bef1234-1284)
Name Birth Death Joined with
John II, Count of Hainaut (1247-1304) 1247 22 August 1304 Philippa of Luxembourg (1252-1311)

Boudewijn van Avesnes (aft1247-aft1299)
Johanna van Avesnes (?-1304)
Bouchard van Avesnes (1251-1296)
Guy d'Avesnes (c1253-1317) 1253 23 May 1317 Utrecht, Netherlands
Willem van Avesnes (1254-1296)
Floris van Avesnes (1255-1297)

Common ancestors of Jean I d'Avesnes (1218-1257) and Aleid van Holland (bef1234-1284)

  1. Adela of Normandy (c1062-1138)
  2. Dirk II de Lorraine (c1050-1115)
  3. Ermengarde of Maine (-1126)
  4. Fulk I of Jerusalem (c1090-1143)
  5. Gertrude of Flanders (1080-1117)
  6. Sibylla of Anjou (1116-1165)
  7. Stephen II, Count of Blois (c1045-1102)
  8. Thierry of Flanders (1100-1168)

Footnotes (including sources)

‡ General