Matthew married Mary of Boulogne, Countess of Mortaigne about 1160 (Annulment). Mary (daughter of Stephen I of Blois, King of England and Matilda of Boulogne, Countess of Boulogne) was born about 1136; died in 1182 in Saint Austrebert, Montreuil, France; was buried in Saint Austrebert, Montreuil, France. [Group Sheet] [Family Chart]
Matilda married Henry I The Courageous, Duke of Brabant in 1179. Henry (son of Godfrey III, Count of Louvain and Marguerite of Limbourg) was born in 1165; died on 5 Sep 1235. [Group Sheet] [Family Chart]
Margaret married Gerard III, Count of Guelders in Jan 1206. Gerard (son of Otto I, Count of Guelders and Richardis of Bavaria) was born in 1185; died on 22 Oct 1229. [Group Sheet] [Family Chart]
Mary married Otto IV of Brunswick, Holy Roman Emperor after 19 May 1214 in Maastricht. Otto (son of Henry the Lion of Saxony, Duke of Saxony and Bavaria and Matilda (Maud) Plantagenet) was born about 1183; died on 19 May 1218. [Group Sheet] [Family Chart]
Family/Spouse: William I of Holland, Count of Holland. William (son of Floris III of Holland, Count of Holland and Ada of Huntingdon, Countess of Holland) was born about 1167 in The Hague, Netherlands; died on 4 Feb 1222. [Group Sheet] [Family Chart]
Henry married Maria of Germany Hohenstaufens before 22 Aug 1215. Maria (daughter of Philip of Swabia Hohenstaufen, Holy Roman Emperor and Irene of Byzantium Angelina) was born on 3 Apr 1201 in Arezzo, Tuscany, Italy; was christened in 1201; died on 29 Mar 1235. [Group Sheet] [Family Chart]
Family/Spouse: Sophie of Thuringia, Duchess of Brabant. Sophie was born on 20 Mar 1224; died on 29 May 1275; was buried in Villers Abbey, Brabant. [Group Sheet] [Family Chart]
Matilda married Henry VI the Younger, Count Palatine of the Rhine in 1212. Henry (son of Henry V of Zelle Longus, Count Palatine of Rhine and Agnes of Hohenstaufen) was born about 1196; died on 26 Apr 1214; was buried in Schönau Abbey near Heidelberg. [Group Sheet] [Family Chart]
Matilda married Floris IV of Holland, Count of Holland on 6 Dec 1224. Floris (son of William I of Holland, Count of Holland and Adelaide of Guelders) was born on 24 Jun 1210 in The Hague, Netherlands; died on 19 Jul 1234 in Corbie, France. [Group Sheet] [Family Chart]
Family/Spouse: William IV, Count of Jülich. William (son of William III of Jülich, Count of Jülich and Mathilde of Limburg) was born about 1210; died on 16 Mar 1278. [Group Sheet] [Family Chart]
Family/Spouse: Margaret of Cleves. Margaret and died. [Group Sheet] [Family Chart]
Otto married Philippe of Dammartin between 1252 and 1254. Philippe (daughter of Simon of Dammartin de Danmartin, Count of Aumâle, Count of Ponthieu and Montreuil and Marie (Jeanne) of Ponthieu, Countess of Ponthieu) died on 14 Apr 1278; was buried in Gravendal Abbey, Gueldres. [Group Sheet] [Family Chart]
Matilde married Robert I of Artois Capet, Count of Artois on 14 Jun 1237. Robert (son of Louis VIII the Lion of France Capet, King of France and Blanche of Castile) was born in Sep 1216; died on 9 Feb 1250. [Group Sheet] [Family Chart]
Matilde married Guy (Guion) III of Chastillon, Count of Saint-Pol on 16 Jan 1255. Guy (son of Hugh I (V), Count of Blois and Mary, Countess of Blois) died in 1289. [Group Sheet] [Family Chart]
Family/Spouse: William III, Count of Flanders and Lord of Kortrijk. William (son of William II of Dampierre, Lord of Dampierre and Margaret II of Constantinople, Countess of Flanders) was born in 1224; died on 6 Jun 1251. [Group Sheet] [Family Chart]
Henry married Adelaide of Burgundy, Duchess of Brabant in 1251. Adelaide (daughter of Hugh IV of Burgundy, Duke of Burgundy and Yolande de Dreux) was born about 1233; died on 23 Oct 1273. [Group Sheet] [Family Chart]
Elizabeth married Albert I the Great of Brunswick-Lüneburg, Duke of Brunswick-Lüneburg on 13 Jul 1254. Albert (son of Otto I, Duke Brunswick-Lüneburgh and Matilda von Brandenburgh) was born in 1236; died on 15 Aug 1279. [Group Sheet] [Family Chart]
Family/Spouse: Elizabeth of Brunswick-Lüneburg. Elizabeth (daughter of Otto I, Duke Brunswick-Lüneburgh and Matilda von Brandenburgh) died on 27 May 1266; was buried in Middelburg abbey church. [Group Sheet] [Family Chart]
Adelaide married John of Avesnes, Count of Hainaut on 9 Oct 1246. John (son of Burchard of Avesnes d'Avesnes and Margaret II of Constantinople, Countess of Flanders) died on 24 Dec 1257. [Group Sheet] [Family Chart]
Family/Spouse: Herman I von Henneberg, Count of Henneberg. Herman (son of Poppo VII von Henneberg, Count of Henneberg and Jutta of Thuringia) was born in 1224; died on 18 Dec 1290. [Group Sheet] [Family Chart]