Career
He was Lord of Avesnes, Leuze and Condé. He built castles in Landrechies and Condé. Nicholas was married to Matilda de la Roche, the widow of Thierry de Walcourt.
They had the following children:
James, succeeded his father as Lord of Avesnes, died during the Third Crusade
Ida (d c 1205), married Ingelram, Count of Saint Pol and secondly, castellan William IV of Saint-Omer
Fastrad, warden of La Flamengerie Abbey. He had three children, of whom James became bishop of Tournai
a daughter
possibly Radulf.