Cognomen Kambaja (Kambaja 
) , around the globe, is a rare last name. The surname Kambaja is characteristic of the Democratic Republic of the Congo, where it is a rare surname, Estonia, and South Africa, where it is a very rare surname. Not in comparison with a country's population, the name is most common in the Democratic Republic of the Congo, South Africa, and the United States. Very seldom, Kambaja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kambaja | South Africa, United States, Estonia, Democratic Republic of the Congo |