Originally Posted by
Damiăo de Góis
There are several maps, and in all of them it peaks in Italy. But it's all speculation. What i think it's certain is that the peoples that came to Iberia in the Iron Age (all of them) weren't all one haplogroup so it's very difficult to guess which people carried which haplogroup (to Iberia, in this case).
It's also possible that the Iron Age didn't change haplogroups that much in Iberia and the R1b haplogroups being discussed were already here. Sampling is very few so far.