Surname Ngwaja (Ngwaja 
) , throughout the world, is a very rare cognomen. The cognomen Ngwaja is characteristic of Sub-Saharan Africa, particularly South Africa, where it is a very rare surname, and Nigeria. Also, Ngwaja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ngwaja | Nigeria, South Africa |