Cognomen Zaitchenko (Зайченко 
, Заиченко , Zaitchenko 
) , in the entire world, is a common last name. The last name Zaitchenko is habitual in Eastern Europe, particularly Ukraine, where it is quite a common surname, Belarus, where it is quite a rare surname, and Russia. Not in comparison with a country's population, this name is the most popular in Russia, Ukraine, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Заиченко, Зайченко | Kazakhstan, Belarus, Ukraine, Kyrgyzstan, Russia |
| Zaitchenko | United States, Canada |
| Заитченко | Kazakhstan, Russia |