Arvirargus or Arviragus was a legendary British king of the 1st century AD, possibly based upon a real person.
[1] Geoffrey of Monmouth's Historia Regum Britanniae (1136) presents a legendary Arviragus who is contemporary with the emperor Claudius (41–54 AD).
[2][3] However, Geoffrey's work is highly romanticised and contains little trustworthy historical fact, rendering his account of Arvirargus suspect.
As Vespasian prepares to land, such a large British force stands ready that he flees to another port, Totnes, where he sets up camp.
He and his brother Guiderius had been kidnapped in childhood by Belarius, a nobleman wrongly banished by Cymbeline, and brought up in secret in Wales, but are reunited with their father and sister Imogen in time for the Roman invasion.
[6] The records of Henry Herbert (Master of the Revels) show that a play called Arviragus was performed at the Court of Charles I on 26 and 27 December 1636.