Two entries with the name Plantamor.

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Plantamor

Plantamore, Platamor

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A Saxon king slain by Arthur at the battle of Clarence.

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Source
Le Livre d’Artus | Early 13th century

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Plantamor

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The steed ridden by Arthur during the battle against the Saxons at Vambieres.

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Source
Le Livre d’Artus | Early 13th century

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