Cognomen Leletko (Leletko 
, Лелетко 
) , throughout the world, is a rare family name. The last name Leletko is habitual in Belarus, where it is a rare surname, Russia, and Kazakhstan. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Russia, Belarus, and Ukraine. Much less frequently, Leletko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Leletko | Russia, Poland |
| Лелетко | Russia, Ukraine, Kazakhstan, Belarus |
| stefan leletko Polish weightlifter, PL (b. 1953) |
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| iryna leletko Ukrainian sportsperson, UA (b. 1993) |
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