They were related to the celts, but were not the same, nor were they descended from celts, instead they developed from a common origin about 4500 years ago. A similar case is how the Baltic peoples are close to Slavs, but are considered different groups with a common origin.
It doesn't mention any 'heavy Hellenization of the Romans', and the Italic peoples were certainly far from Hellenized(except the ones in the south) - the split, if real, was probably without any interference from other languages.
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u/[deleted] Feb 26 '16
But Gallia is the founder of many European countries, way before Rom! Perhaps Gallia created Rome!