750 BC to 12 BC, Celts were the most powerful people in central northern Europe. Wave after wave they spread outwards, taking over France, Belgium, crossing to Britain. There were many tribes of Celts, speaking a vaguely common language. Celt comes from the Greek "Keltoi" which means barbarians is properly pronounced as "Kelt". Celt is a term NOT used until the 18th century. The Romans called these people Britons. The Celtic Iron Age ended 43 AD when the Romans invaded Britain
