Family name Kluczynski (Kluczynski 
, Ключинский 
) , in the entire world, is quite a rare cognomen. The last name Kluczynski is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, Poland, and Russia, where it is a rare surname. In absolute terms, it most frequently occurs in Poland, Russia, and the United States. Also, Kluczynski is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kluczynski | Germany, United Kingdom, United States, Poland, France |
| Ключинский | Kyrgyzstan, Kazakhstan, Russia, Belarus |
|
john c. kluczynski American politician (1896–1975), US (b. 1896) |
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| thomas e. kluczynski American judge, US (b. 1903) |
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| melissa a kluczynski researcher (ORCID 0000-0003-3947-4222) |
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| krzysztof kluczynski researcher |
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