Iberians is commonly used to describe the ancient people living in Hispania before the Roman invasion to be fair.
I understand what you are saying, but at the moment it seems we are going for more descriptive civilisations in game.
Asians is obviously a lot less descriptive since you have around 48 countries in the Asian continent.
But Iberian covers at least 5 different culture groups between a small peninsula.
Spain itself is a plurinational state with overlap of different territorial and ethnolinguistic identities than of a sole Spanish identity.
You have Basques, Catalans, Galicians, Andalucians and Valencians, and I’m not even counting the Portuguese, a different country and culture.
Sounding cooler is not always correct.
Viking sounds cool, but as we are often reminded, it was an occupation not a civilization.
I gave my suggestion of the Portuguese because it’s an homogeneous cultural group within the Iberian Peninsula, and not Iberians.
I have been toying with the Idea of trying to make one for Spain, but like I previously said, how can you represent what once where so many different crowns in one civ without upsetting anyone?
The English just represent the English, not the Welsh, not the Scottish, not the Irish.