Two entries with the name Brion.

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Brion

Brions

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A castle in France near the home of the Lady of the Lake. It was separated from the castle Charosque by the forest of Briosque.

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Source
Vulgate Lancelot | 1215-1230

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Brion

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A castle belonging to Alain of Escavalon.

Alain once lodged Gawaine at the castle, and Gawaine slept with Alain’s daughter, Florée, begetting a son.

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Source
Le Livre d’Artus | Early 13th century

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