Nielsen Hayden genealogy
Descendants of Bertha
Bertha
Folmar ( - Bef 995)
   ├─ Folmar
   │
   │    └─ Gottfried of Metz ( - Between 1051 and 1055)
   │    
   │         + Judith
   └─ Richilde
    Thierry I (Abt 965 - Between 11 Apr 1026 and 2 Jan 1027)(m. 985)
       └─ Frederick II of Lorraine (Abt 995 - 1027)
        Mathilde of Swabia ( - Abt 1032)(m. Aft 1011)
            + Louis de MontbĂ©liard (Between 1005 and 1019 - Between 1070 and 1073)(m. 1032)