Two entries with the name Conon.

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Conon

Kahenin

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A duke who gave a castle to two giants who had rescued him from prison. The castle was later conquered by Lancelot.

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Source
Vulgate Lancelot | 1215-1230

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Conon

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In Dryden’s King Arthur, the duke of Cornwall under Arthur. He was the father of Arthur’s beloved wife, Emmeline.

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Source
King Arthur; or, the British Worthy | John Dryden, 1691

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