Surname Troyanovskii (Трояновский 
, Troyanovskii 
) , in the entire world, is quite a rare last name. The family name Troyanovskii is characteristic of Belarus, where it is quite a rare surname, Russia, where it is a rare surname, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Трояновский | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Troyanovskii | Russia, Israel, Belarus |