Nielsen Hayden genealogy
Family: Berchtold IV von Zähringen / Heilwig von Froburg (F14485)
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Konrad I of Zähringen and Burgundy (1090-1152)
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Clemence de Namur ( -1158)
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| Berchtold IV von Zähringen (1125-1186)
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| Heilwig von Froburg ( -1182) |
Agnes von Zähringen ( -1239)  |