Iron Age Britons/the original Celts – the Iron Age 750 BC – 50 A.D.
Long before the arrival of these Germanic tribes though, Britain was already inhabited by the Celts.
The name Celts is a 'modern' name used to collectively describe all the many tribes of people living in Europe in the Iron Age, from around 750 years BC. up to 43 A.D. when the Ancient Romans, under Julius Ceaser, invaded Britain.
Celts occupied many parts of central and western Europe during the Iron Age, especially what are now Austria, Switzerland, southern France and Spain. Over several years, in wave after wave, they spread outwards, taking over France and Belgium, and crossing to Britain.The Romans considered the Celts a formidable enemy who once successfully attacked Rome.
During the Iron Age there were three main groups of Celts in Europe: