Nielsen Hayden genealogy
Family: Friedrich II, Holy Roman Emperor / Bianca Lancia (F15140)
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Heinrich VI, Holy Roman Emperor (1165-1197)
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Constance of Sicily ( -1198)
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| Manfredo Lancia (1170-1215) |
| Friedrich II, Holy Roman Emperor (1194-1250)
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| Bianca Lancia (1212- )
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Manfredo, King of Sicily (1232-1266)  |