Cognomen Ngoina (Ngoina 
) , globally, is a rare surname. The family name Ngoina is characteristic of Sub-Saharan Africa, particularly Kenya, where it is a rare surname, and Tanzania. Very seldom, Ngoina is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ngoina | Tanzania, India, Nigeria, Kenya |