What is "togodumnus"

Togodumnus (d. AD 43) was a historical king of the British Catuvellauni tribe at the time of the Roman conquest. He can probably be identified with the legendary British king Guiderius.

He is usually thought to have led the fight against the Romans alongside his brother, but to have been killed early in the campaign. However, some authorities now argue that he sided with the Romans and is one and the same person as the client-king Tiberius Claudius Cogidubnus, whose original name may have been Togidubnus or Togodumnus.