Last name Klyachko (Klyachko 
) , around the world, is a very rare cognomen. The last name Klyachko is habitual in Cyprus, where it is quite a rare surname, Russia, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Klyachko | Cyprus, United States, Canada, Russia |
| ilya klyachko Russian musician, RU (b. 1905) |
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| natalia klyachko researcher |
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| vitaly a klyachko researcher |
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| alex klyachko researcher in nuclear and medical physics |
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| anton aleksandrovich klyachko Ph.D. Lomonosov Moscow State University 1994, RU |
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| ekaterina klyachko researcher |
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