Sanche was the son of García IV Sánchez de Navarre but his mother is unknown. The date and place of his birth have not been found.
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García IV Sánchez de Navarre |
Sanche III Garcès de Navarre |
García III Sánchez de Navarra |
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Ximena Fernandez de León |
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Munia maior Elvira Sanchez de Castilla |
Sancho I García de Castilla |
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Urraca Gómez de Salvador de Castille |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | sire d'Uncastilla |