Cognomen Kouelaba-Ngongo (Kouelaba-Ngongo 
) , all around the world, is a rare surname. The surname Kouelaba-Ngongo is habitual in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is a rare surname. Parts of the name also exists independently as a last name Kouelaba, and a last name Ngongo.
| VARIANT | COUNTRY |
|---|---|
| Kouelaba-Ngongo | Democratic Republic of the Congo |