Cognomen Rabaja (Rabaja 
, Рабая 
) , in the entire world, is quite a rare surname. The cognomen Rabaja is characteristic of Philippines, where it is quite a rare surname, United Arab Emirates, where it is a rare surname, and Greece, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Philippines, Russia, and United Arab Emirates. Very seldom, Rabaja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rabaja | Philippines, United Arab Emirates, United States, India, Indonesia |
| Рабая | Russia, Ukraine |