Cognomen Kluczyński (Kluczyński 
, Ключинский 
) , all around the world, is a rare last name. The surname Kluczyński is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, Poland, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Kluczyński | Poland |
| Ключинский | Kazakhstan, Russia, Belarus, Kyrgyzstan |
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wincenty kluczyński PL (b. 1847) |
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wacław kluczyński Colonel of the Polish Army, BY (b. 1890) |
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| stefan kluczyński Officer of the Polish Army, PL (b. 1881) |
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andrzej piotr kluczyński PL (b. 1972) |
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| jan kluczyński (b. 1936) |
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| janusz kluczyński researcher |
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| tomasz kluczyński Polish sportsperson and athletics competitor, PL (b. 1993) |
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Alan, Janusz, Tomasz, Wojtek, Mateusz, Michał, Miłosz, Andrzej, Daniel, Bartosz, Dariusz, Łukasz, Grzegorz, Jarosław, Waldemar, Sebastian, Arkadiusz, Ryszard, Bartłomiej, Robert, Konrad, Arek, Adam, Mirek, Karol, Kamil, Piotr, Dawid, Patryk, Jakub, Marcin, Maciej, Maciek, Szymon, Adrian, Cezary, Kacper, Natan, and Krzysztof