Kim is the most common Korean surname, comprising about 20 percent of 
          the Korean population. 
          
The two largest Kim clans, the Kim 
          family of Gimhae and the Kim family of Kyungju, are descended from 
          semi-mythological characters who lived two thousand years ago.
          *For reference, Gimhae or Kyungju is the name of the region where 
          Gimhae city and Kyungju city of Gyeongsangnam-do, South Korea.
*The 
          American pronunciation of Gimhae is Kimhae, but it would be correct to 
          write same as the name of the Gimhae city.
*The Korean pronunciation is Gim(沿), but 
          when used in foreign countries, most of them use Kim(鉄).
 
          Gimhae Kim, Gimhae Heo and Inchon Lee (Yi), these 3 clans associate 
          their Bon-gwan (geo-biological lineage roots) to Gimhae in South 
          Gyeongsang Province of Korea, and these clans place restrictions on 
          marriage with each other due to the shared ancestors. Today, the 
          Gimhae Gim clan is the largest clan group among them.