If you want to name a person’s nationality, you take the country’s name + in ().  Here are some examples:

Germany : 독일.  German person : 독일인.

France : 프랑스.  French person : 프랑스인.

Korea : 한국.  Korean person : 한국인.

China : 중국.  Chinese person : 중국인.

America : 미국.  American person : 미국인.

Another way to name someone’s nationality is to add the country + saram (사람).

Germany : 독일.  German person : 독일 사람.

France : 프랑스.  French person : 프랑스 사람.

Korea : 한국.  Korean person : 한국 사람.

China : 중국.  Chinese person : 중국 사람.

America : 미국.  American person : 미국 사람.

If you want to know how to name other nationalities that are not mentioned here, just look up the country in a Korean dictionary and attach either the or 사람 at the end of it.