Cognomen Klajner (Klajner 
) , in the world, is a rare last name. The family name Klajner is characteristic of Croatia, where it is a rare surname, Argentina, where it is a very rare surname, and Poland. Not in comparison with a country's population, the name is most common in Argentina, Brazil, and Poland. Also, Klajner is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Klajner | Germany, Croatia, Poland, Argentina, Brazil |
| daniel klajner Swiss conductor, CH (b. 1963) |
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| sidney klajner researcher |
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| rafael kogan klajner researcher |
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