Family name Chajko (Chajko 
, Шажко 
) , worldwide, is a rare surname. The surname Chajko is habitual in Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Kyrgyzstan. Measured by absolute frequency, this name is the most popular in Eastern Europe, particularly Ukraine, Belarus, and Russia. Very seldom, Chajko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chajko | Germany, Belarus, Czechia, Poland, United States |
| Шажко | Kazakhstan, Russia, Ukraine, Kyrgyzstan |