Nielsen Hayden genealogy
Family: Hermann von Calvelage / Ethelinde von Northeim (F14820)
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Herman von Enham ( -1029)
|
Mathilde de Verdun ( -1039)  |
| Otto I von Northeim (1025-1083)
|
| Richenza ( -1083) |
| Ita von Northeim ( -1100) |
| Kuno von Beichlingen ( -1103) |
| Heinrich von Northeim (1051-1101) |
| Siegfried III von Northeim (1053-1107) |
| Otto I von Calvelage (1100-1170) |