Nielsen Hayden genealogy
Family: Manfredo, King of Sicily / Beatrice of Savoy (F15137)
m. Abt 1248Friedrich II, Holy Roman Emperor (1194-1250) 
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Bianca Lancia (1212- )
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| Amedee of Savoy (1197-1253)
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| Marguerite of Burgundy (1192-1242)
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Margereta of Savoy ( -1254)  |
| Manfredo, King of Sicily (1232-1266)
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| Beatrice of Savoy (1223-1259)
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| Constance of Sicily (1249-1301) |