Cognomen Klac (Klac 
, Клац 
) , around the globe, is a rare family name. The family name Klac is characteristic of Serbia, where it is quite a rare surname, Belarus, where it is a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Klac | Serbia, Mexico, Malaysia |
| Клац | Ukraine, Russia, Belarus |
| bohuslav klac CZ (b. 1879) |
|