Dumnovellaunus or Dubnovellaunus was a king ruling in south eastern England during the British Iron Age. In Britain, the Iron Age lasted from about the 7th century BC until the Roman conquest and until the 5th century AD in non-Romanised parts. ...

Evidence from coin distribution indicates he ruled over Kent east of the River Medway although a different issue of coinage bearing his name has also been found in Essex. Other coins found in Kent suggest other rulers there, one perhaps called Vodenos. Dumnovellaunus ruled following the death of Tasciovanus in the last few years BC. Theories involve him seizing a portion of Tasciovanus' Catuvellauniian territory or him being granted the kingdom of east Kent by Cunobelinus, Tasciovanus' successor. Kent is a county in England, south-east of London. ... The River Medway in England flows for 112 km from Turners Hill, in West Sussex, through Tonbridge, Maidstone and Rochester in Kent, to the River Thames at Sheerness. ... Essex is an administrative county in the East of England. ... Tasciovanus was a historical king of the British Catuvellauni tribe before the Roman conquest. ... BC may stand for: Ballistic Coefficient  a measure of air drag on a projectile by calculating a ratio its sectional density to its coefficient of form. ... The Catuvellaunii (meaning probably good in battle) were one of the Celtic tribes living in the British Isles, before the Roman invasion of Britain. ... Cunobelinus (also written Kynobellinus, Cunobelin) was a historical king of the Catuvellauni tribe of pre-Roman Britain. ...

According to the Monumentum Ancyranaum he and Tincomarus, a king of the Atrebates tribe, fled to Rome as supplicants to Augustus around AD 7. The reason is unclear although the political instability in the region at the time suggests he was deposed. Tincomarus had been driven out of his capital at Silchester by Eppillus who in turn was also forced from power and moved to Kent to supplant Dumnovellanus. Tincomarus was a king of the Iron Age Belgic tribe of the Atrebates who lived in southern central Britain immediately prior to the Roman invasion. ... The Atrebates (meaning settlers) were a Belgic tribe of Gaul and Britain before the Roman conquests. ... Ancient Rome was a civilization that existed in Europe, North Africa, and the Middle East between 753 BC and its downfall in AD 476. ... Augustus (plural Augusti) is Latin for majestic or venerable. The greek equivalent is sebastos, or a mere grecization (by changing of the ending) augustos. ... For other uses, see number 7. ... Silchester is a village and civil parish in the English county of Hampshire. ...

Cunobelinus appears to have then united Kent and Essex in his kingdom, granting Dumnovellaunus' realm to his own son, Adminius. Adminius was a son of Cunobelinus, ruler of the Catuvellauni, a tribe of Iron Age Britain. ...