The Gallic Rooster https://en.wikipedia.org/wiki/Gallic_rooster Marianne https://en.wikipedia.org/wiki/Marianne Gauls https://en.wikipedia.org/wiki/Gauls France https://en.wikipedia.org/wiki/List_of_wars_involving_France https://en.wikipedia.org/wiki/List_of_battles_involving_France_in_modern_history Are the words Gaelic and Gallic related? https://en.wikipedia.org/wiki/Gaelic French football jersey has le coq gaulois
I think their people(celts, gauls) are very closely related. Brittany and its culture is fascinating. Worth a visit if you're ever in France.
Celts settled in Eastern Europe / Balkan Peninsula also, their migration routes are interesting. https://en.wikipedia.org/wiki/Celtic_settlement_of_Eastern_Europe On the other hand, French region Bretagne has name similarity with Brittany https://en.wikipedia.org/wiki/Brittany_(administrative_region) Land of Britons: https://en.wikipedia.org/wiki/Brittany Britons are people of this area: https://en.wikipedia.org/wiki/Celtic_Britons Normandy is connected with Normans https://en.wikipedia.org/wiki/Normandy In further text, it's visible that Gauls and Belgae are Celts. https://en.wikipedia.org/wiki/Belgae Usually people think wrongly, that Belgium is only French-Dutch state. But, Belgae tribe also existed. Gallia Belgica https://en.wikipedia.org/wiki/Gallia_Belgica Wales is obviously connected with the word Wallonia https://en.wikipedia.org/wiki/Wallonia In Spanish language, the state Wales is Gales. Again, Gaule spectre. Pre-Roman period in Europe was very interesting, vibrant, with much more tribes, who acted differently. Today's states embraced a lot of different pre-Roman tribes and with all of them created one nation. Roman amphitheatres: https://en.wikipedia.org/wiki/List_of_Roman_amphitheatres Romans created fascinating things from Algeria - Scotland - Syria area. Imagine only how many people switched places. https://en.wikipedia.org/wiki/List_of_Roman_amphitheatres