1. Nicholas d'Avesnes married Mathilda de la Roche.
Mathilda de la Roche was the daughter of Henry, Lord de la Roche ( - ) and Matilda of Limburg ( - ). She and Nicholas d'Avesnes had the following children:
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2. Jacques D'AVESNES, son of Nicholas d'Avesnes and Mathilda de la Roche, was born in 1150. He died in 1191.
Jacques D'AVESNES had the following children:
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3. Archdeacon Bouchard d'Avesnes, son of Jacques D'AVESNES, was born in 1180. He was a Clergyman, Archdeacon of Laon. He died in 1244. He married Margaret of Hainault.
Margaret of Hainault, daughter of Baldwin VI, Count of Hainault ( - ), was born in 1202. She died in 1280. She and Bouchard d'Avesnes had the following children:
| 4 | Jean I d'Avesne (1218-1257). Jean was born in 1218. He died in 1257. |