Family name Sulkovskii (Сулковский 
, Sulkovskii 
) , in all the world, is a rare surname. The family name Sulkovskii is habitual in Belarus, where it is quite a rare surname, Estonia, where it is a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Сулковский | Russia, Belarus |
| Sulkovskii | Russia, Estonia, Belarus |