The list begins with Eun Jiwon of Sechskies, whose surname is found in only 16,894 individuals (0.034% of Koreans). Next up is Jessi, whose full name is Ho Hyunjoo/Jessica Ho and shares her surname with 326,770 people (0.66%). Former Baby V.O.X member Kan Miyoun rounds out the top three with a surname found in only 2,520 individuals (0.005%).

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  • Eun Jiwon (Sechskies) has a rare surname found in only 16,894 individuals (0.034% of Koreans). This makes him one of the few idols to have such an uncommon last name.
  • Jessi shares her surname with 326,770 people (0.66%), which is still considered relatively rare compared to more common surnames like Kim or Lee.
  • Kan Miyoun (former Baby V.O.X) has a surname found in only 2,520 individuals (0.005%). Her unique last name sets her apart from many of her fellow idols.
  • Taecyeon of 2PM shares his surname with 25,107 people (0.051%), making it one of the rarest surnames on this list.
  • Baekhyun of EXO has a Byun surname that is shared by only 138,789 individuals (0.279%). Breaking down the numbers further shows that he shares his specific Byun with 60,633 people, while another group shares their Byun with 78,156.
  • Jae-hyun from Golden Child has a Bong surname found in only 12,927 individuals (0.026%). This makes him one of the few idols to have such an uncommon last name.
  • Ong Seongwu is part of a smaller group with his Ong surname being shared by 967 people (0.0019%). His specific surname comes from the Okcheon Ong clan, which accounts for the majority of the Ong surnames in South Korea.
  • Danielle, a member of NewJeans, shares her surname with 21,912 individuals (0.059%). Although it may seem relatively common compared to others on this list, it is still considered rare in comparison to more prevalent surnames like Kim or Lee.
  • Seungkwan from SEVENTEEN has a Boo surname found in only 10,536 people (0.021%). His unique last name sets him apart from his fellow idols.
  • P.O of Block B shares his Pyo surname with an unspecified number of individuals, which is considered to be relatively rare compared to more common surnames.
  • Zico has a Lee surname that is shared by over 7 million people (14.1% of Koreans), making it one of the most common surnames in South Korea.
  • Boram of SISTAR shares her Kim surname with over 10 million individuals (20.4% of Koreans), making it another extremely common last name among K-Pop idols.
  • Sunny from Girls' Generation has a Kim surname that is shared by nearly 11 million people (21.8% of Koreans). This makes it one of the most prevalent surnames in South Korea.

The list also includes Zico, Boram of SISTAR, and Sunny from Girls’ Generation, who all share more common surnames that are found in a significant number of Koreans. Their inclusion serves as a stark contrast to the idols mentioned at the top of the list, whose rare surnames make them stand out.

The numbers provided for each idol highlight just how uncommon their last names truly are. With over 50 million South Koreans living in the country, it’s impressive that some idols have managed to maintain such unique and rare surnames.