Family name Klesc (Клещ 
, Klesc 
) , globally, is a rare surname. The last name Klesc is characteristic of Eastern Europe, particularly Slovakia, where it is quite a rare surname, Belarus, where it is a rare surname, and Ukraine. Measured by absolute frequency, this name is the most popular in Eastern Europe, particularly Russia, Ukraine, and Belarus.
| VARIANT | COUNTRY |
|---|---|
| Клещ | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Klesc | Canada, United States, Czechia, Slovakia |