Originally Posted by
XenophobicPrussian
See, thing is, Celts aren't going to be like those northern French ones either. They're too northern, would still need way too much Roman to get modern Swiss from N. French+Scandinavian+Roman. Even if we say La Tene/Hallstatt period Celts still formed a cline from N. Iberians to N. French by 500 BC+, that still means the average is around SW/South/Central French, which is what I've been saying after I made that thread about the Lech samples(originally was saying Basque-like of course, which is still close enough regardless).
The dates say it all, SX20(closest to Spanish_Barcelona): 1693-1609 BC is the youngest sample on there(excluding MX265, the eastern one), most the closest to Calais_French ones are older than 2000 BC(not that they didn't exist later, 1 out of 6 middle 1000s BC Lech_MBA clustered around N. French/Belgium rather than Iberians/SW French like the rest and one 1800 BC one from this paper is Britanny like). If we take SharpFork's word for it on SX18, the only other Iron Age sample in this paper(200 BC+) and go by the steppe/farmer/WHG ratio it has, fits right with what northern Iberians have, around 30% steppe, 15% WHG(although I haven't been able to find anything about this sample in supp data), and the other one closest to Croats.
I was right all along. :)