Cognomen Osyko (Osyko 
, Осыко 
) , in all the world, is a rare last name. The cognomen Osyko is habitual in Kazakhstan, where it is a rare surname, Russia, and Belarus.
| VARIANT | COUNTRY |
|---|---|
| Osyko | Ukraine, Russia, Germany |
| Осыко | Kyrgyzstan, Russia, Kazakhstan, Belarus, Ukraine |