There is also Celtic history in what is now Spain, France, Italy... They were some of the peoples I was describing being assimilated into Rome. The current Spanish community of Galicia (the bit of Spain just above Portugal) has its name derived from Romans describing Celts living there. The "-gal" part of the name Portugal also derives from a reference to Celts.
https://www.independent.co.uk/news/uk/this-britain/celts-des...