This is the 2424th most frequent Korean word.
김기현
"김기현" is a Korean name, typically referring to a person.
In this sentence, '김기현' is used as a proper noun to refer to a person's name.
김기현은 오늘 회사에 출근했습니다.
Kim Ki-hyun went to work at the company today.
Here, '김기현' is also used as a proper noun, mentioning a person held accountable for an event.
이번 사건의 책임은 김기현에게 있습니다.
The responsibility for this incident lies with Kim Ki-hyun.
In this context, '김기현' is a proper noun showing possession, as indicated by the particle '의' which translates to 'of' in English.