What is the rarest last name in Korean?

I'm curious, have you ever wondered about the rarity of surnames in different cultures? In Korea, for instance, there's a fascinating aspect to their naming conventions. What is the rarest last name in Korean, do you suppose? It's a fascinating question that delves into the intricacies of Korean culture and language. Is there a surname that stands out as being particularly uncommon or unique among the Korean population? And if so, what is the story behind it? Let's delve into this intriguing inquiry together and uncover the answer.