Cognomen Шлёнский (Shlensky 
, Шлёнский 
, Shlyonsky ) , across the world, is a rare family name. The family name Шлёнский is habitual in Belarus, where it is a very rare surname, Kazakhstan, and Russia. Measured by absolute frequency, it most frequently occurs in the United States, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Shlensky | Russia, United States, Canada |
| Шлёнский | Belarus, Russia, Kazakhstan |
| Shlyonsky | United States, Canada |
| Shlenskii | Russia |
Shlenskiy, Shlonsky, Shlyonskiy, and שלונסקי