Nielsen Hayden genealogy
Family: Federico II of Aragón, King of Sicily / Eleanora d'Anjou (F13162)
m. May 1303Pedro III, King of Aragon; King of Sicily (1240-1285) 
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Constance of Sicily (1249-1301)
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St. Isabel of Portugal (1271-1336)  |
| Maria I, Queen of Hungary (1257-1323)
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| Margaret of Anjou (1272-1299) |
| Federico II of Aragón, King of Sicily (1272-1337)
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| Eleanora d'Anjou (1289-1341)
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| Pietro II of Aragón, King of Sicily (1304-1342) |
| Elisabeth of Aragon (1309-1349) |