The Hallstatt Culture which, at first, shared a common European language root with the northern tribes, branched westward to a developing period call "La Tene". Here a warrior-aristocracy evolved where a warrior took his two-wheeled chariot and sword to his grave! The earliest roots of languages, by this time, had split with the Celtic branch dividing from the Germanic branch. They both shared the culture of family, which was the center of society and social rank. It is unclear at what point the southern group became known at "Celts", but they had an advantage over most other tribes due to iron. Their iron weapons had a distinct advantage when their might was to make right. As their culture moved southward, eastward, and westward, they shared a common language called "Continental Celtic" which was to branch into Brythonic, Gaulish, and Manx. The Germanic branch divided into the Northern Germanic languages and the Western Germanic languages. By the time the Anglo-Saxon language and the Welsh language collided on an island centuries yet to come, their tongues had become so distinct and different sounding, that they could not understand or pronounce the other's speech.
It is the conflict between these two languages that leads to the surname JONES.