Surname นันจา (Nanja 
, นันจา 
) , all around the world, is a rare last name. The cognomen นันจา is characteristic of Guinea, where it is quite a rare surname, Zambia, and Portugal, where it is a rare surname. In absolute terms, it is commonest in Guinea, Zambia, and India. More frequently, นันจา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nanja | Guinea, Netherlands, Madagascar, India, Zambia |
| นันจา | Thailand |