Surname Kruchinskii (Kruchinskii 
, Кручинский 
) , globally, is a rare last name. The cognomen Kruchinskii is habitual in Belarus, where it is a rare surname, Russia, where it is a very rare surname, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Kruchinskii | Russia, Belarus |
| Кручинский | Kazakhstan, Russia, Belarus |