Last name Cernus (Cernus 
) , throughout the world, is a very rare cognomen. The family name Cernus is characteristic of Israel, where it is a very rare surname, Argentina, and Germany, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in the United States, Argentina, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Cernus | Israel, United States, Germany, Argentina |