Matthew married Marie De Boulogne, Comtesse De Mortain Et De Boulogne in 1162 in Boulogne, Nord-Pas-De-Calais (Région), France. Marie (daughter of King Stephen De Normandie, Of Blois Of England and Matilda De Boulogne) was born in 1136 in Boulogne-Sur-Mer, Departement du Pas-De-Calais, Nord-Pas-De-Calais, France; died on 25 Jul 1182 in Saint Austrebert, Eure-Et-Loir, France; was buried in 1182 in Montreuil, Departement du Pas-De-Calais, Nord-Pas-De-Calais, France. [Group Sheet] [Family Chart]

1. Ida Countess Of Dammartin was born about 1161 in Of, Boulogne, P-Cls, France; died in 1216 in Boulogne-Sur-Mer, Pas-De-Calais, Frankrijk; was buried in Boulogne-Sur-Mer, Pas-De-Calais, Frankrijk.
2. Mathilde De Boulogne was born on 22 May 1162 in Boulogne, Pas-De-Calais, Nord-Pas-De-Calais, France; was christened in Vlaanderen, Belgium; died on 16 Oct 1210 in Leuven, Louvain, Vlaams-Brabant, Belgium; was buried in 1211 in Leuven, Louvain, Vlaams-Brabant, Belgium.