Constantine III - Augustus of Imperium Romanum from 409 AD to 411 AD
Flavius Claudius Constantinus - known as Constantine III - was a Roman general who declared himself Western Roman Emperor in Britannia in 407 and established himself in Gaul.

Recognised by the Emperor Honorius in 409, Constantine suffered a collapse of support and military setbacks that led to his abdication in 411. He was captured and executed shortly afterwards.

Coins of Contantine III are rare but not exceptionally so.
Constantine III
Emperor Constantine III of the Roman Empire