Wizkid and Chris Brown perform in South Africa

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Why so many Koreans are called Kim

A SOUTH KOREAN saying claims that a stone thrown from the top of Mount Namsan, in the centre of the capital Seoul, is bound to hit a person with the surname Kim or Lee. One in every five South Koreans is a Kim—in a population of just over 50m. And from the current president, Park Geun-hye, to rapper PSY (born Park Jae-sang), almost one in ten is a Park. Taken together, these three surnames account for almost half of those in use in South Korea today. Neighbouring China has around 100 surnames in common usage; Japan may have as many as 280,000 distinct family names. Why is there so little diversity in Korean surnames?