Carausius II is the name given by historians to a possible imperial usurper in Roman Britain

Roman Britain

Roman Britain was the part of the island of Great Britain controlled by the Roman Empire from AD 43 until ca. AD 410.The Romans referred to the imperial province as Britannia, which eventually comprised all of the island of Great Britain south of the fluid frontier with Caledonia...

 between the years 354

354

Year 354 was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Constantius...

 and 358

358

Year 358 was a common year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Datianus and Cerealis...

. Coins appear during this period bearing the name which is the same as an earlier British usurper emperor, Carausius

Carausius

Marcus Aurelius Mausaeus Valerius Carausius was a military commander of the Roman Empire in the 3rd century. He was a Menapian from Belgic Gaul, who usurped power in 286, declaring himself emperor in Britain and northern Gaul. He did this only 13 years after the Gallic Empire of the Batavian...

.

No other evidence of Carausius II is known although Roman Britain at the time was an unstable and dangerous place and pretenders to the throne were likely.