Cognomen Ibara-Koumou (Ibara-Koumou 
) , in the world, is a rare family name. The last name Ibara-Koumou 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 Ibara, and a last name Koumou.
| VARIANT | COUNTRY |
|---|---|
| Ibara-Koumou | Democratic Republic of the Congo |