Nielsen Hayden genealogy
Descendants of Aleidis of Brabant
Abt 1194 - Bef 1267 (~ 72 years)Father: Henri I of Brabant (Abt 1158 - 5 Sep 1235 Koln, Germany)
Mother: Machtild of Boulogne (Abt 1169 - Between 1210 and 1211 bur.Afflighem Abbey, Brabant, Belgium)
Aleidis of Brabant (Abt 1194 - Bef 1267)
Guillaume IX d'Auvergne (Abt 1195 - 1246)(m. Bef 3 Feb 1225)
   ├─ Mahaut d'Auvergne ( - 20 Aug 1280)
   │ Robert II de Clermont (Abt 1220 - Mar 1282)
   │    └─ Robert III de Clermont (Abt 1250 - 7 Mar 1324)
   │     Alixente de Mercoeur ( - 15 Jul 1286)(m. 1279)
   │        └─ Jean dit Dauphinet de Clermont (Abt 1280 - 10 Mar 1351) =>
   │         + Anne de Poitiers-Valentinois ( - 17 Mar 1351)(m. 22 May 1313)
   └─ Marie d'Auvergne ( - 19 May 1280)
    Walter VII Berthout (Abt 1225 - Abt 1286)(m. 1238)
       └─ Floris Berthout ( - Between 15 Oct 1331 and 26 Nov 1331)
        Mehaut von der Mark ( - Between 17 Apr 1319 and 21 Jul 1319)
            + Reinald II of Guelders (Abt 1295 - 12 Oct 1343 Arnheim, Gelderland, Netherlands)(m. 11 Jan 1311)