Nielsen Hayden genealogy
Descendants of Erard II de Brienne
- 1191Father: Gautier II of Brienne ( - Bef 1161)
Mother: Adelais of Baudemont
Erard II de Brienne ( - 1191)
   ├─ Gauthier III de Brienne (Abt 1165 - Jun 1205 Sarno, Campania, Italy)
   │ Elvira de Lecce ( - Aft 1216)(m. 1200 Melun, Seine-et-Marne, Île-de-France, France)
   │    └─ Gauthier IV de Brienne (1205 - Between 1247 and 1251 Cairo, Egypt)
   │     Marie de Lusignan (1215 - Aft 1251)(m. Abt 1233)
   │         + Isabelle de la Roche-sur-l'Ognon
   └─ Jeane de Brienne, King of Jerusalem; Latin Emperor of Constantinople (Abt 1175 - 23 Mar 1237 Constantinople)
    Bérenguère of Castile-León (Abt 1199 - 12 Apr 1237 Constantinople)(m. 1223 Burgos, Castile, Spain)
       ├─ Jean de Brienne ( - 8 Jan 1296 bur.Maubuisson Abbey near Pontoise, near Paris, France)
       │ Jeanne de Châteaudun ( - Abt 1254 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)
       └─ Louis de Brienne
        Agnes de Beaumont
            + Alice Comyn ( - Bef 10 Aug 1349)(m. Bef 14 Jul 1310)