Duchy of Brittany
- Ruling Houses
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House of de Cornouaille
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House of Eudon II de Porhoët
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House of de Penthièvre
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House of Thouars
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House of Dreux
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House of Pierre I of Dreux
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House of Jean I de Dreux
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House of Jean III of Dreux
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House of de Montfort
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House of Valois
- Counties
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- Viscounties
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- Lordships
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