The link between Pyrene and Heuneburg is speculation. You can see that from my link. I didn‘t over do it, all I did was report it. Please don‘t shoot the messenger. Then again, much of what we are discussing is based on speculation especially when we are told to credit some sources and discredit others without a clear picture as to why.

For the life of me I can not figure out why anyone supposed to be a scholar of such topics would have used the quote from Herodotus to show anything on this topic.

Hecataeus of Miletus was the first to mention the Celts, whom he placed near “Massilia”(Marseille). http://mappery.com/map-of/Hecataeus-World-Map

The quote used is not to show the location of the Celts but to promote his theory of symmetry between the continents. He is not moving them to Iberia. http://www.livius.org/a/1/maps/herodotus_map.gif He just places them on the Atlantic Coast.

This is just wishful thinking on the part of those suggesting it.

On the names that the Greeks and Romans used for the Celts, could you provide some deeper insight into where they appear to be of peoples other than them and the document they are drawn from?

I have not run across or found any references to anything along those lines, and as it seems to be an important part of the argument it would be helpful were it clearly shown.

Most of the ancient authors place the Celts at once in the region of the source of the Danube and on the Atlantic Coast. They were renowned as mercenaries and used in Mediterranean wars as early as the 4th century BC. They are written about in their expansion into the Balkans and as mercenaries in the wars of others, to include in the Peloponnesian War, along with Iberians and others. Is it surprising that people, presumably with a sense of geography and direction, might consider raiding or expanding into areas of fabled wealth? We know they traded with them. Should we doubt that they could find them? Should we doubt they were of sufficient warlike disposition to raid or expand in other directions?

This is the part that is most baffling. I can agree that there is sufficient reason to examine a western origin of the Celts but can’t understand the reason to doubt those who move eastward as different from those who stayed closer to home.