Nielsen Hayden genealogy
Family: Louis VIII, King of France / Blanche of Castile, Queen Consort of France (F1042)
m. 23 May 1200Philippe II Augustus, King of France (1165-1223) 
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Isabella of Flanders, Queen Consort of France (1170-1190)
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| Eleanor of England (1161-1214)
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Urraca of Castile (1186-1220)  |
| Louis VIII, King of France (1187-1226)
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| Blanche of Castile, Queen Consort of France (1188-1252)
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| St. Louis IX, King of France (1214-1270) |
| Robert of France (1216-1250) |
| Charles I Etienne, King of Naples and Sicily (1226-1285) |