Surname Tchoudnovskaia (Tchoudnovskaia 
, Чудновская 
) , across the world, is a rare last name. The surname Tchoudnovskaia is habitual in Belarus, where it is a rare surname, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Tchoudnovskaia | United States, Germany, Australia |
| Чудновская | Russia, Kazakhstan, Ukraine, Kyrgyzstan, Belarus |