Surname Aruj (อรุณ 
, Aruj 
, Оруч 
) , across the world, is quite a rare last name. The cognomen Aruj is habitual in Thailand, where it is quite a rare surname, Argentina, where it is a rare surname, and Costa Rica, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Thailand, India, and Argentina. Predominantly, Aruj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อรุณ | Thailand |
| Aruj | Saudi Arabia, Philippines, India, Pakistan, Argentina |
| Оруч | Kazakhstan, Kyrgyzstan, Russia, Ukraine |
| Арудж | Russia |
| raffaele aruj Italian painter, photographer and engraver (1801-1857) (b. 1801) |
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| eugenio aruj Italian photographer (1839-1878), IT (b. 1839) |
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