조선족: Korean descendants living in China 고려인(사람): Korean descendants living in former Soviet states, including Ukraine. 고려인 is a carefully chosen term due to the diplomatic relation to both North and South Korea since 고려 embraces both.

we don't use 고려사람. 고려 is one of old times of Korea like Middle ages what did you wanna say instead of 고려사람?

아아, 고려인. 감사합니다!

한국에서 자연스러운 표현은 아닙니다만, 한국계 러시아인을 고려인이라고는 합니다.