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Immediate Family
About Seisyll mab Owain, King of the Britons {Legendary}
Sisillius III (Welsh: Saesyllt) was a legendary king of the Britons as accounted by Geoffrey of Monmouth. He was preceded by Oenus and succeeded by Beldgabred. He shares his name with his ancestors Sisillius II and Sisillius I.
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