Ugh, thats a quite big question. For a start:
Belgium - medieval coinage - only coin there yet is from 14th century. Modern Belgium exist only from 1830 and before it was administered by Habsburg dynasty. So medieval coinage must be from 14th and 15th centuries, when there were many feudal states.
Celtic Britain - two tribes are already mentioned in there. And there were many more - pointing to wikipedia here. Era - 1 century BC - 1 century after Christ - with some tribes continuing after roman invasion
Hispania is very similar to Britain - last tribes were subdued by Romans only in year 19 after Christ.
Again - see wikipedia for the names of tribes.
Regards,
Jarek
I'm the creator of Hispania (ancient) and Celtic Britain, you may find the topic I first created to ask about what to do (as the 1st Hispanian coin initially misclassified as Gaul) and finally to prepare the community to the new countries. All of these, like Jarcek said, were made by tribe with low/no Roman influence. By this way, I may create another one later: Liguria (ancient) as Ligurians are a proto-celtic tribe.
Concerning Belgium - Feudal, I consider this as an heresy. Even if, according to some referees inside the 300 countries club topic, this name is following the Krause system, it has no logic as all Belgian/Dutch/Luxembourgish coinage was not independant but as part of (from the oldest to the youngest) Holy Roman Empire, Burgundian Netherlands, Spanish Netherlands and Austrian Netherlands. According to the minting year, this coin may be part of the Holy Roman Empire. This move may be subject to debate later.
Administrateur du catalogue, référent de nombreuses nations antiques et de la Lorraine.
Catalogue administrator, numerous Antique nations and Lorraine referee.