Family name Boguslavskaia (Богуславская 
, Boguslavskaia 
) , in all the world, is quite a rare cognomen. The surname Boguslavskaia is habitual in Russia, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Belarus.
| VARIANT | COUNTRY |
|---|---|
| Богуславская | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Boguslavskaia | Russia, Georgia |
| kseniia boguslavskaia (b. 1892) |
|