This is the 5053rd most frequent Korean word.
김주형
"김주형" is a Korean name and does not have a specific definition; it typically refers to a person.
In this sentence, '김주형' is used as a proper noun to refer to a specific person, functioning as the subject of the sentence.
김주형은 오늘 학교에 갔습니다.
Kim Joo-hyung went to school today.
Here, '김주형' is used possessively ('김주형의') to indicate ownership of the book.
김주형의 책을 찾고 있습니다.
I am looking for Kim Joo-hyung's book.
In this sentence, '김주형' is mentioned specifically as a name, where '이라는' implies that it is being defined or referred to as such.