Nielsen Hayden genealogy
Descendants of Hugo VI of Egisheim
Abt 970 -Father: Hugo V (Abt 935 - Bef 986)
Mother: Luitgard von Metz
Hugo VI of Egisheim (Abt 970 - ??)
Heilwig von Dagsburg ( - 1046)
   ├─ Hildegarde of Egisheim
   │ Richwin
   │    └─ Louis de Montbéliard (Between 1005 and 1019 - Between 1070 and 1073)
   │     Sophie of Bar (Bef 1020 - 1092)(m. 1032)
   │        └─ Thierry I of Bar-le-Duc (Abt 1045 - 2 Jan 1105) =>
   │         + Ermentrude of Burgundy ( - 8 Mar 1105)(m. Abt 1065)
   ├─ Gerhard I ( - 1038)
   │
   │    └─ Hildegard of Egisheim-Dagsburg (Abt 1028 - Abt 1095)
   │     Frederick of Büren (Abt 1020 - 1053)(m. Abt 1042)
   │        └─ Frederick I of Swabia (Abt 1050 - Bef 21 Jul 1105 bur.Lorch Abbey, Baden-Württemberg, Germany) =>
   │         + Agnes of Germany (1073 - 24 Sep 1143 bur.Klosterneuberg, Austria)(m. Abt 1086)
   ├─ Hugo VII of Egisheim ( - Between 1046 and 1049)
   │ Mechtild
   │    └─ Heinrich I of Egisheim ( - Abt 28 Jun 1065)
   │     (Unknown) von Moha
   │        ├─ Gerhard II of Egisheim ( - 1098 Egisheim, Elsass-Lothringen, Germany) =>
   │        │ + Richarde
   │         + Ermisende of Luxembourg (Abt 1080 - 24 Jun 1141)
   ├─ Gertrude of Egisheim ( - 21 Jul 1077)
   │ Liudolf of Brunswick ( - 23 Apr 1038)
   │    └─ Ekbert I of Brunswick (Abt 1036 - 11 Jan 1068)
   │     Irmingard de Susa ( - 28 Jan 1078)(m. 1058)
   │         + Heinrich von Northeim (Abt 1051 - Bef 10 Apr 1101)
   └─ Pope Leo IX (21 Jun 1002 Alsace, France - 19 Apr 1054 Rome)