Surname 克纳 (Kerner 
, 克纳 
) , all around the world, is a common last name. The family name 克纳 is habitual in Estonia, where it is quite a common surname, Hungary, where it is quite a rare surname, and Germany. Measured by absolute frequency, the name is most common in Germany, the United States, and Hungary. Much less frequently, 克纳 is the forename as well as the last name.