Cognomen Kłoczko (Клочко 
, Kłoczko 
) , around the world, is a common last name. The family name Kłoczko is habitual in Eastern Europe, particularly Ukraine, where it is quite a common surname, Belarus, and Russia, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Клочко | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Kłoczko | Poland |
| marek kłoczko Polish manager, politician, PL (b. 1951) |
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| tomasz kłoczko Polish sportsperson, PL (b. 1971) |
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| grzegorz kłoczko PL (b. 1963) |
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| jacek kłoczko (b. 1969) |
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| janusz kłoczko Polish hematologist, PL |
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| maciej kłoczko |
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