Nicholas De Avesnes
Nicholas was born about 1129 in Oizy, Namur, Belgium.  He died in 1170 in Avesnes, Pas-De-Calais, France.

 Mathilda De La Roche
Mathilda De was born in 1133 in La Roche, Belgium.

 Ida De Avesnes
Ida was born about 1166 in Avesnes, Pas-De-Calais, France.