Nielsen Hayden genealogy
Descendants of Mathieu of Flanders
Abt 1138 - 1173 (~ 35 years)Father: Thierri III of Lorraine (Abt 1098 - 17 Jan 1168)
Mother: Sibyl of Anjou (1112 - 1165)
Mathieu of Flanders (Abt 1138 - 25 Jul 1173 Driencourt, Somme, Picardy, France)
Marie of England (1136 - 1182 Monastery of Sainte-Austreberthe, Montreuil, France)(m. 1160)
   ├─ Ida of Flanders ( - 1216)
   │ + Berchtold IV von Zähringen (Abt 1125 - 8 Dec 1186)(m. 1183)
   └─ Machtild of Boulogne (Abt 1169 - Between 1210 and 1211 bur.Afflighem Abbey, Brabant, Belgium)
    Henri I of Brabant (Abt 1158 - 5 Sep 1235 Koln, Germany)(m. 1179)
       ├─ Margareta of Brabant (Abt 1192 - 5 May 1231)
       │ Gerhard van Gelre (Abt 1185 - 22 Aug 1229)(m. Abt 1206)
       │    ├─ Richardis van Gelre ( - Between 1293 and 1298) =>
       │    │ + Wilhelm IV (1210 - 16 Mar 1278 Aachen, Westphalia, Germany)(m. Bef 10 Jan 1250)
       │    │ + Wilhelm IV (1210 - 16 Mar 1278 Aachen, Westphalia, Germany)(m. 12 Mar 1237)
       │     + Philippa de Dammartin ( - Between 14 Apr 1277 and 1281)(m. 1253)
       ├─ Aleidis of Brabant (Abt 1194 - Bef 1267)
       │ Guillaume IX d'Auvergne (Abt 1195 - 1246)(m. Bef 3 Feb 1225)
       │    │ + Robert II de Clermont (Abt 1220 - Mar 1282)
       │     + Walter VII Berthout (Abt 1225 - Abt 1286)(m. 1238)
       ├─ Machteld of Brabant (Abt 1200 - 21 Dec 1267)
       │ Floris IV of Holland (24 Jun 1210 - 19 Jul 1234)(m. Aft 5 Nov 1214)
       │    ├─ Adelaide of Holland (Abt 1230 - Between 1 Mar 1284 and 7 Apr 1284) =>
       │    │ + John d'Avesnes (Apr 1218 Houffalize, Luxembourg (now Belgium) -
       │    │ 24 Dec 1257 Valenciennes, Nord-Pas-de-Calais, France)(m. 9 Oct 1246)
       │    │ 24 Dec 1257 Valenciennes, Nord-Pas-de-Calais, France)(m. 9 Oct 1246)
       │    └─ Margaretha van Holland (Abt 1234 - 26 Mar 1277) =>
       │     + Hermann I von Henneberg (1224 - 18 Dec 1290)(m. 24 May 1249)
       └─ Henri II of Brabant (1207 - 1 Feb 1248)
        Maria von Hohenstaufen (Abt 1201 - 1235)(m. 22 Aug 1215)
        :   ├─ Mahaut of Brabant (Abt 1224 - 29 Sep 1288 bur.Cercamp Abbey, Artois, France) =>
        :   │ + Robert of France (17 Sep 1216 - 9 Feb 1250 Mansourah, Egypt)(m. 14 Jun 1237)
        :   │ + Guy II de Châtillon (Abt 1230 - 12 Mar 1289)(m. Abt 31 May 1254)
        :   └─ Henri III of Brabant (Abt 1230 - 28 Feb 1261 Leuven, Vlaams-Brabant, Belgium) =>
        :    + Alix of Burgundy (Abt 1233 -
        :    23 Oct 1273 bur.Church of the Dominicans, Leuven, Vlaams-Brabant, Belgium)(m. 1251)
        :    23 Oct 1273 bur.Church of the Dominicans, Leuven, Vlaams-Brabant, Belgium)(m. 1251)
        Sophia von Thüringen (20 Mar 1224 - 29 May 1275)(m. 1240)
           └─ Heinrich I von Hessen (24 Jun 1244 - 21 Dec 1308) =>
            + Adelheid of Brunswick-Lüneburg ( - 12 Jun 1274)(m. Bef 10 Sep 1263)