Nielsen Hayden genealogy
Family: Berchtold IV von Zähringen / Ida of Flanders (F14486)
m. 1183
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Konrad I of Zähringen and Burgundy (1090-1152)
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Clemence de Namur ( -1158)
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| Mathieu of Flanders (1138-1173)
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| Marie of England (1136-1182)
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Machtild of Boulogne (1169-1210)  |
| Berchtold IV von Zähringen (1125-1186)
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| Ida of Flanders ( -1216)
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