Question about Brennos' interview

[Arjos]

If there is such a quote I would be very interested. It might help in terms of where the word is actually from.

I'll try to find it. If my memory serves, they were mentioned as allies in the sense of a dependent group, which Keltic polities could call up to fight...
Obviously it was all from a Roman point of view, so there might be a lot of romanocentric rationalization...

what Koch is suggesting (and his, and others', work on Celtic from the West is certainly not consistent with that)

How does he fits something like Lepontic being attested, with a different alphabet, not even a century after Tartessian? Simply by moving the "however-he-likes-to-call" Proto-Celtic's homeland on the Atlantic?
If so, what is that an Indo-European teletransport that skipped half of Europe?