Cognomen Semachko (Семашко 
, Semachko 
) , all around the world, is quite a common family name. The surname Semachko is characteristic of Eastern Europe, particularly Belarus, where it is quite a common surname, Russia, where it is quite a rare surname, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Семашко | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Semachko | Lithuania, United States |
| nikolaï semachko (b. 1907) |
|