Nielsen Hayden genealogy
Descendants of Olive of Brittany
- Aft 1173Father: Stephen of Brittany ( - 21 Apr 1135 bur.St. Mary's, York, Yorkshire, England)
Mother: Hawise ( - Aft 1135)
Olive of Brittany ( - Aft 1173)
Henri de Fougères ( - Abt 1150 Savigny Abbey, Normandy, France)
   └─ Raoul II de Fougères ( - Between 1191 and 1194)
    Mathilde
       └─ Guillaume de Fougères ( - 1187)
        Agatha du Hommet
           └─ Geoffroi de Fougères ( - 1212 bur.Savigny Abbey, Normandy, France) =>
            + Mathilde of Porhoët ( - Bef 1231)