Nicholas "Plukiel" Seigneur d' Avesnes
Nicholas "Plukiel" Seigneur d' was born about 1129 in Oizy, Namur, Belgium.  He died about 1170 in Avesnes, Pas-de-Calais, France.

 Mahaut (Mathilda) Countess de la Roche
Mahaut (Mathilda) Countess de was born in 1133 in La Roche, Belgium.

 Jacques Seigneur d' Avesnes
Jacques Seigneur d' was born about 1150 in Avesnes, Pas-de-Calais, France.  He died on September 7th, 1191 in near Arsoef, Syria (in battle).

 Adelaide d' Avesnes
Adelaide d' was born about 1152 in Avesnes, Pas-de-Calais, France.

 Ida d' Avesnes
Ida d' was born about 1160 in Avesnes, Pas-de-Calais, France.