Nielsen Hayden genealogy
Descendants of Alan III
Bef 1100 - 1146 (> 46 years)Father: Stephen of Brittany ( - 21 Apr 1135 bur.St. Mary's, York, Yorkshire, England)
Mother: Hawise ( - Aft 1135)
Alan III (Bef 1100 - 15 Sep 1146 Brittany, France)
Bertha of Brittany (Abt 1119 - Between 1162 and 1167)(m. Abt 1137)
   └─ Conan IV (Abt 1138 - 20 Feb 1171)
    Margaret of Huntingdon (Abt 1145 - 1201 bur.Sawtrey Abbey, Huntingdonshire, England)(m. 1160 England)
       └─ Constance of Brittany (Abt 1162 - 4 Sep 1201 Nantes, Brittany, France)
        Guy de Thouars (Abt 1155 - 13 Apr 1213 Chemillé, France)(m. Bef Oct 1199)
           └─ Alix de Thouars (1201 - 21 Oct 1221 bur.Convent of the Cordeliers, Nantes, Brittany, France) =>
            + Pierre de Braine (Between 1187 and 1190 - Abt 28 May 1250 At sea)(m. Mar 1213)