Surname Nkoa-Souolo (Nkoa-Souolo 
) , in all the world, is a rare cognomen. The surname Nkoa-Souolo 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 Nkoa.
| VARIANT | COUNTRY |
|---|---|
| Nkoa-Souolo | Democratic Republic of the Congo |