Family name Bna-Koubaka (Bna-Koubaka 
) , globally, is a rare last name. The family name Bna-Koubaka is characteristic of 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 Koubaka.
| VARIANT | COUNTRY |
|---|---|
| Bna-Koubaka | Democratic Republic of the Congo |