Family name Slupskiy (Slupskiy 
, Слупский 
) , across the world, is a rare cognomen. The cognomen Slupskiy is habitual in Belarus, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Slupskiy | United States |
| Слупский | Kazakhstan, Russia, Belarus |