This is the 6707th most frequent Korean word.
윤상현
"윤상현" is a Korean name, typically used to refer to a person.
Here, 윤상현 refers to a proper noun, specifically the name of an individual.
윤상현은 훌륭한 배우로 알려져 있다.
Yoon Sanghyun is known as an excellent actor.
In this sentence, 윤상현 is possessive, indicating the acting of someone named 윤상현.
윤상현의 연기가 이번 드라마에서 돋보였다.
Yoon Sanghyun's acting stood out in this drama.
Here, 윤상현 refers to the specific name of a person introduced in the context.