Ethnic (adjective)

1. Relating to a particular nation, people or culture.
2. Relating to a particular racial or cultural group.
3. Relating to one's national or cultural origins or identity.

Origin:

From latin ethnicus ("heathen, pagan, gentile"), from greek ἔθνος (éthnos, "nation, people").

Examples:

1. The ethnic diversity of the city is one of its strengths.
2. The ethnic group is the largest minority group in the country.
3. The ethnic background of the immigrants is diverse.
4. He has an ethnic name.
5. She has an ethnic restaurant.