Family: Alfonso X, King of Castile / Maria de Guzman Guillen (F2337)
Ferdinand III King of Castile (1192-1252) 
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Beatrice Princess of Germany (1193-1234)
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| Alfonso X, King of Castile (1228-1284)
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| Maria de Guzman Guillen (1238-1262) |
| Beatrice of Castile (1241-1303) |