This is the 11347th most frequent Korean word.
김은정
"김은정" is a Korean name, typically with "김" (Kim) as the family name and "은정" (Eun-jung) as the given name. It does not have a standalone meaning.
In this sentence, '김은정' refers to a person's full name, acting as the subject.
김은정은 학교에 갔다.
Kim Eun-Jung went to school.
Here, '김은정' is used to address someone formally with the honorific '씨', as the object of the verb.
그는 김은정 씨를 칭찬하였다.
He praised Ms. Kim Eun-Jung.
In this context, '김은정' identifies the speaker's friend and serves as an object in the sentence.