The ancient Iberians were a tribal community before the Celts migrated into Spain forming the Celtiberians
Here is a link to their culture
http://news.softpedia.com/news/Who-Were-the-Iberians-78220.shtml
The Iberian Basque had a settlement in Gascony and perhaps the Romans spead their genes far and wide
http://i1.wp.com/www.cjroots.com/wp...estryDNA-Colleen-Greene-Iberian-Peninsula.png
Modern Iberians today I suppose would live in or have recorded ancestry in the Iberian Peninsula
It's like comparing the Celtic Britians to the Modern British, the average British natives are 60% Ancient Britian so it's looks like the Native Iberians and Britians genetically absorbed their invaders over time.
The hunch that I have the most confidence on
Italy/Greece=Greco-Roman
Great Britian=P-Celtic
Ireland=Gealic (Milsean, Irish pirates or Viking trade influence?) If not these three options, I'm all ears on how the Geals could've made it to spain
Africa North/Middleeast=Moors
European West=Germanics
Scandinavia=Visigoths