Sisillius III (Welsh: Saesyllt) was a legendary king of the Britons as accounted by Geoffrey of Monmouth. He reigned approximately 173-167BC.[1]
He was preceded by Oenus[2] and succeeded by Beldgabred. He shares his name with one of the sons of Ebraucus and his ancestors Sisillius II and Sisillius I.
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