About France.

[rashka]

The name Gaul was used for France at one time and it was obviously named after the name "Celt". Gaul was under Roman rule for 500 years. Since the Franks, for which France was named after, were a group of warring Germanic tribes who eventually embraced Gallo-Roman culture, has France ever consider renaming their region back to Gaul? There are still some Celtic remnants such as Breton: Republik C'hall
and whose people are trying to sustain a dying language:
Breton (Brezhoneg) is a Celtic language spoken in Brittany (Breton: Breizh; French: Bretagne), France. Breton is a Brythonic language, descended from the Celtic British language brought from Great Britain to Armorica by migrating Britons during the Early Middle Ages. Like the other Brythonic languages, Welsh and Cornish, it is classified as an Insular Celtic language. Breton is most closely related to Cornish, as both are thought to have evolved from a Southwestern Brythonic protolanguage. The other regional language of Brittany, Gallo, is a Langue d'oïl derived from Latin and is consequently relatively close to French.

and not to mention the vast amount of words of Celtic origin that French has.

A bit more on Gaul's history:
During the 2nd and 1st centuries BC, Gaul fell under Roman rule: Gallia Cisalpina was conquered in 203 BC and Gallia Narbonensis in 123 BC. Gaul was invaded by the Cimbri and the Teutons after 120 BC, who were in turn defeated by the Romans by 101 BC. Julius Caesar finally subdued the remaining parts of Gaul in his campaigns of 58 to 51 BC. Roman control of Gaul lasted for five centuries, until the last Roman rump state, the Domain of Soissons, fell to the Franks in AD 486. During this time, the Celtic culture had become amalgamated into a Gallo-Roman culture and the Gaulish language was likely extinct by the 6th century.

[Osweo]

Yes, there were some movements to readopt 'Gaul' after the Revolution.

The previous regime had favoured the Germanic Frankish side in their official historiography, so this was a natural reaction.

I suppose it wasn't popular to change the familiar name of the entire country, though.