Nielsen Hayden genealogy
Family: Pedro III, King of Aragon; King of Sicily / Constance of Sicily (F15138)
m. 13 Jun 1262James I, King of Aragón (1208-1276) 
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Violant of Hungary ( -1251)
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Yolande of Aragón (1237-1301)  |
| Isabella of Aragon, Queen Consort of France (1243-1271) |
| Manfredo, King of Sicily (1232-1266)
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| Beatrice of Savoy (1223-1259)
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| Pedro 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) |
| Federico II of Aragón, King of Sicily (1272-1337) |