Last name Cerniavskis (Cerniavskis 
) , around the globe, is a very rare family name. The surname Cerniavskis is habitual in Northern Europe, particularly Lithuania, where it is quite a rare surname, Estonia, where it is a rare surname, and the United Kingdom, where it is an extremely rare surname. In absolute terms, the name is most common in Lithuania, Brazil, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Cerniavskis | Brazil, Lithuania, Estonia, United Kingdom |