Wikipedia
Viridomarus
Viridomarus or Britomartus as translations vary, (died 222 BC) was a Gaulish military leader who led an army against an army of the Roman Republic at the Battle of Clastidium. The Romans won the battle, and in the process, Marcus Claudius Marcellus, the Roman leader, earned the spolia opima by killing Viridomarus in single combat.