Cognomen קוביליוס (Kubilius 
, קוביליוס 
) , in the entire world, is quite a rare family name. The cognomen קוביליוס is habitual in Northern Europe, particularly Lithuania, where it is quite a common surname, Latvia, where it is quite a rare surname, and Estonia, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Lithuania, the United States, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Kubilius | United Kingdom, Latvia, United States, Lithuania, Argentina |
| קוביליוס | Israel |