Family name Клявзуник (Клявзуник 
) , in all the world, is a very rare cognomen. The family name Клявзуник is characteristic of Eastern Europe, particularly Belarus, where it is a rare surname, Ukraine, where it is a very rare surname, and Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Клявзуник | Russia, Ukraine, Belarus |