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I'm neither a team member nor an expert, so these are just some thoughts from me.

The Lusitanians probably are "lumped together" with the Iberians, because historically the terms were not used with ethnicity in mind. At least Strabo and Diodorus Siculus count the Lusitanii as Iberians. Similar case are the "Germans", which originally has been a geographical term, that only later has been filled with different meanings.

I had the belief "Spain" was just an anglification of the latin "Hispania", but to be honest, I find it a bit far fetched to take that difference as a tool in an argument about national legitimacy. This is just to express my surprise, not to dismiss anything.

Now, room for those who really have something to say