Family name Okassi-Ngassaki (Okassi-Ngassaki 
) , all over the world, is a rare last name. The family name Okassi-Ngassaki 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 Okassi, and a last name Ngassaki.
| VARIANT | COUNTRY |
|---|---|
| Okassi-Ngassaki | Democratic Republic of the Congo |