House of Porhoët
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House of Porhoët
Lords of Josselin
Viscounts and Counts of Porhoët
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House of Rohan
Viscounts of Rohan and Léon
Counts of Porhoët
Issued from Alain I de Rohan, 3rd son of Eudon I de Porhoët -
House of Zouche
Lords of Ashby de la Zouch
Issued from Alain, 3rd son of Geoffroy, Viscount of Porhoët
English branch
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Eudon II de Porhoët
Viscount of Porhoët
Duke of Brittany