Seisyll ap Owain, King of the Britons
|Also Known As:||"Sisillius", "Sitsylth"|
|Death:||Died in Britain|
|Occupation:||King of the Britons|
|Managed by:||Douglas John Nimmo|
About Seisyll ap Owain, King of the Britons
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.