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Last name Калныньш (Kalnins , Калныньш , Kalnynsh) , around the globe, is quite a common cognomen. The surname Калныньш is habitual in Northern Europe, particularly Latvia, where it is a common surname, Lithuania, where it is quite a rare surname, and Estonia. Not in comparison with a country's population, the name is most common in Latvia, the United States, and Germany.