Nielsen Hayden genealogy
Descendants of (Unknown daughter of Heribert I)
Father: Heribert I of Kinziggau ( - 992)
Mother: Ermentrude
(Unknown daughter of Heribert I)
Frederick I of Luxembourg (965 - 6 Oct 1019)(m. Bef 995)
   ├─ Gisela of Luxembourg ( - Aft 1058 bur.Chapel of St. Lawrence, Ghent, Flanders)
   │ Ralph de Gand ( - Between 1052 and 1056)
   │    └─ Gilbert I de Gant (Abt 1034 of Folkingham, Bourne, Lincolnshire, England -
   │     Abt 1095 bur.Bardney Abbey, Yorkshire, England)
   │     Abt 1095 bur.Bardney Abbey, Yorkshire, England)
   │     Alice de Montfort
   │        ├─ Walter de Gant (of Folkingham, Bourne, Lincolnshire, England -
   │        │ 1139 Bardney Abbey, Yorkshire, England) =>
   │        │ 1139 Bardney Abbey, Yorkshire, England) =>
   │        │ + Maud of Brittany (m. Bef 1120)
   │         + Alan de Percy (of Topcliffe, Yorkshire, England - Bef Dec 1135 bur.Whitby, Yorkshire, England)
   ├─ Imiza of Luxembourg (Abt 1000 - Aft 2 Aug 1055)
   │ Welf II ( - 10 Mar 1030)(m. Abt 1017)
   │    └─ Kunigunde of Altdorf (Abt 1020 - Bef 31 Mar 1055)
   │     Albert Azzo II (997 - 20 Aug 1097)(m. Abt 1035)
   │        └─ Welf I of Bavaria ( - 6 Nov 1101 Paphos, Cyprus) =>
   │         + Judith of Flanders (Abt 1033 - 5 Mar 1094 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)
   │         (m. 1071)
   │         (m. 1071)
   ├─ Frederick of Luxembourg (Abt 1003 - Aft 1035)
   │ Gerberge de Boulogne ( - Aft 1059)
   │    └─ Jutta of Luxembourg
   │     Walram (Abt 1030 - 1082)
   │        └─ Heinrich I of Limburg and Lower Lorraine (Abt 1059 - 1119) =>
   │         + Adelheid von Pottenstein ( - Aft 13 Aug 1106)
   │         + (Unknown) von Arlon
   └─ Giselbert of Luxembourg (Abt 1007 - 14 Aug 1059)
   
       ├─ (Unknown) von Salm
       │
       │     + Amulrada von Ammensleben
       ├─ Hermann of Salm, Emperor-Elect (Abt 1035 - 28 Sep 1088 Metz, Moselle, Lorraine, France)
       │ Sophie
       │    │ + Agnes von Bar
       │     + Gertrude von Northeim ( - Bef 1165)
       └─ Conrad I of Luxembourg (Abt 1040 - 8 Aug 1086)
        Clementia of Aquitaine ( - 4 Jan 1142)(m. Abt 1073)
           │ + Gottfried of Bliesgau ( - Aft 1075)
           │ + Liutgard von Beichlingen
           └─ Ermisende of Luxembourg (Abt 1080 - 24 Jun 1141) =>
            + Albert of Dagsburg (Abt 1065 - 24 Aug 1098)
            + Godfrey of Namur (Between 1067 and 1068 - 19 Aug 1139 Abbey of Floreffe, Belgium)