Nielsen Hayden genealogy
Descendants of Geoffroi V de Châteaudun
- Aft 1218Father: Hugues V de Châteaudun (Abt 1138 - Bef 1191)
Mother: Jeanne de Preuilly ( - Abt 1211)
Geoffroi V de Châteaudun ( - Aft Nov 1218)
   └─ Geoffroi VI de Châteaudun (1218 - 6 Feb 1250)
    Clémence des Roches ( - Aft Sep 1259)(m. Between 17 May 1219 and 15 Jul 1222)
       └─ Jeanne de Châteaudun ( - Abt 1254 bur.Maubuisson Abbey near Pontoise, near Paris, France)
        Jean de Brienne ( - 8 Jan 1296 bur.Maubuisson Abbey near Pontoise, near Paris, France)(m. 1251)
            + Guillaume de Fiennes (of Wendover, Buckinghamshire, England - 11 Jul 1302 Kortrijk, Flanders)
            (m. Between 18 Jan 1266 and Feb 1267)
            (m. Between 18 Jan 1266 and Feb 1267)