Surname Rubail (Rubail 
, Рубаил 
) , in all the world, is a very rare cognomen. The surname Rubail is habitual in Georgia, where it is a rare surname, Saudi Arabia, where it is a very rare surname, and Malaysia. More frequently, Rubail is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rubail | Azerbaijan, Oman, Saudi Arabia, Malaysia, India |
| Рубаил | Russia |