ethnos, that is EXACTLY what it means
“nations” is word #G1484 ἔθνος ethnos (eth'-nos) n., 1. a race (as of the same habit), i.e. a tribe., 2. (specially) a foreign (non-Jewish) one, Gentiles., 3. (usually, by implication) pagan., [probably from G1486], KJV: Gentile, heathen, nation, people...