Nielsen Hayden genealogy
Family: Freidrich III von Pettendorf / Heilika of Swabia (F8822)
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Frederick I of Swabia (1050-1105)
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Agnes of Germany (1073-1143)
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Frederick II von Hohenstaufen (1090-1147)  |
| Konrad III of Swabia, King of the Romans (1093-1152) |
| Freidrich III von Pettendorf ( -1119)
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| Heilika of Swabia (1087-1111)
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| Heilika von Lengenfeld ( -1170) |