Nation (ethnos) will go to war against nation(ethnos), and kingdom against kingdom. There will be famines and earthquakes in many parts of the world. – Matthew 24:7
At that time there were devout Jews from every nation (ethnos) living in Jerusalem. – Acts 2:5
And they sang a new song with these words:
“You are worthy to take the scroll
and break its seals and open it.
For you were slaughtered, and your blood has ransomed people for God
from every tribe and language and people and nation (ethnos). – Revelation 5:9
The ethnos very naturally and normally carried a corporate meaning in reference to people groups with a certain ethnic identity. In fact, the reference in Acts 2:5 to “every nation“ is very close in form to “all the nations“ in Matthew 28:19. And in Acts 2:5 it must refer to people groups of some kind.