Previously Unknown Monarch Discovered

[Furryanimal]

A new ancient British king has been discovered after an amateur detectorist found a coin bearing his name in a field in Hampshire. Dating from around 50BC and smaller than a fingernail, the gold coin is stamped with the name Esunertos – a previously unrecorded Iron Age ruler who has now been added to the list of British monarchs.
The Knowledge

Esunertos - Wikipedia

 

[hollydolly]

A new ancient British king has been discovered after an amateur detectorist found a coin bearing his name in a field in Hampshire. Dating from around 50BC and smaller than a fingernail, the gold coin is stamped with the name Esunertos – a previously unrecorded Iron Age ruler who has now been added to the list of British monarchs.
The Knowledge
View attachment 309353
Esunertos - Wikipedia

what makes them think he was a British King ?

 

[fuzzybuddy]

If 2,000 years from now, three coins were found in Japan, with "A Lincoln" stamped on them, does that necessarily mean "Lincoln" was an unknown Japanese Emperor?
I think you need a little more corroborative evidence. And especially, when it's easy to create great fakes.