'Nationality' in the Bible

Now the woman was a Gentile (Greek), a Syrophoenician by nationality. And she kept pleading with Him to drive the demon out of her daughter.

He said to them, “You know that it is unlawful for a Jewish man to associate with or befriend a Gentile, or to visit him; and yet God has shown me that I am not to call anyone common or [ceremonially] unclean.