Around the world, Oyandza-Koumou (Oyandza-Koumou 
) is an extremely rare unknown gender given name. Much more frequently, Oyandza-Koumou is the last name as well as the forename. Parts of the name also exists independently as a last name Oyandza, and a last name Koumou.
| VARIANT | COUNTRY |
|---|---|
| Oyandza-Koumou | Democratic Republic of the Congo |