Well, according to the web they were an Indo-European people.....and the Iberians were not Indo-European. So they weren't Iberians, they were ethnically different.
Consensus seems to be they originated from the Alpine region in Gaul. In the 6th Century BCE they migrated to Iberia (possibly, even probably, pushed out by Celts) and settled in what is now southern Portugal, but some time after that were conquered and occupied for at least a century by later Celtic invaders from Gaul, hence they adopted elements of Celtic language, religion and culture that did not originate with them. However, they eventually drove back the Celtic invaders and regained independence from them. Much like the ancient Egyptians were conquered by, but later drove out, the Hyksos, by adopting much of their conquerers' military technology and fighting styles.
See: http://en.wikipedia.org/wiki/Lusitanians
And: http://www.theancientweb.com/explore...?content_id=42
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