Last name Cherkaskyi (Іринарх 
, Черкасский 
, Cherkaskyi 
) , in the world, is quite a rare cognomen. The last name Cherkaskyi is habitual in Russia, where it is a rare surname, Kazakhstan, and Kyrgyzstan.
| VARIANT | COUNTRY |
|---|---|
| Іринарх | Ukraine |
| Черкасский | Ukraine, Russia, Kyrgyzstan, Kazakhstan |
| Cherkaskyi | Ukraine, Germany |
Cherkasky, Cherkassky, and Czerkaski
| leonid cherkaskyi (b. 1938) |
|