This is the 11355th most frequent Korean word.
김정은이
The Korean term "김정은이" refers to Kim Jong-un, the leader of North Korea, with "이" functioning as a subject particle.
In this sentence, '김정은이' functions as the subject of the sentence, indicating who performed the action of going to school.
김정은이 학교에 갔어요.
Kim Jong Un went to school.
Here, '김정은이가' emphasizes the subject of the phrase, used with the subjective particle '가' for emphasis.
김정은이가 한 말은 중요합니다.
What Kim Jong Un said is important.
In this case, '김정은이를' acts as the object of the sentence, indicated by the objective particle '을', showing whom the speaker has not met.