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Cognomen Koson (โกศล , Koson
, Косон
) , in the entire world, is quite a common surname. The cognomen Koson is habitual in Thailand, where it is quite a rare surname, Laos, and Japan. Not in comparison with a country's population, the name is most common in Thailand, Japan, and Poland. More prevalently, Koson is the forename as well as the last name.