Two entries with the name Juvenal.

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Juvenal

Joveniax, Juvenals, Juveneaus

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A Christian bishop appointed to King Nascien’s Orberica by Joseph of Arimathea.

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Source
Vulgate Estoire del Saint Graal | 1220-1235

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Juvenal

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A doctor who healed the wounds that Gawain and Brandelis inflicted upon each other in combat.

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Source
First Continuation of Chrétien’s Perceval | Attributed to Wauchier of Denain, c. 1200

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