Cognomen Tchaïkovski (Чайковский 
, Tchaikovsky 
, Tchaikovski 
) , in the world, is quite a rare family name. The surname Tchaïkovski is habitual in Belarus, where it is quite a common surname, Russia, where it is quite a rare surname, and Kazakhstan. Much less frequently, Tchaïkovski is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Чайковский | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| Tchaikovsky | Brazil, Poland, France, United Kingdom, United States |
| Tchaikovski | Brazil, France, United States, Argentina |
Ceaikovski, Chaikivskyi, Chaikovski, Chaikovsky, Chaikovskyi, Chaykivsky, Chaykovsky, Czajkowscy, Czajkowski, Tschaikowski, Čajkovski, Чайковские, Чайковський, Чайківський, and チャイコフスキー