This is the 7785th most frequent Korean word.
한희수
"한희수" is a Korean name and does not have a specific definition beyond being a personal name.
In this sentence, '한희수' is used as a proper noun to denote a person's name.
한희수는 오늘 학교에서 발표를 했어요.
Han Hee-soo gave a presentation at school today.
Here, '한희수' is again used as a proper noun, functioning as the object of the sentence.
한희수를 본 적 있나요?
Have you ever met Han Hee-soo?
In this example, '한희수' is used as the proper noun recipient of an action, indicating the person being thanked.