Nielsen Hayden genealogy
Family: Charles II, King of Naples, Sicily, and Jerusalem / Maria I, Queen of Hungary (F5895)
m. 1270Charles I Etienne, King of Naples and Sicily (1226-1285) 
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Beatrice de Provence (1234-1267)
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| Istvan V, King of Hungary (1239-1272)
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| Erszebet of Kumania ( -1291)
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Anna of Hungary ( -1284)  |
| Maria I, Queen of Hungary (1257-1323)
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| Margaret of Anjou (1272-1299) |
| Eleanora d'Anjou (1289-1341) |