Cognomen Mbeja (Mbeja 
) , in all the world, is a rare last name. The surname Mbeja is habitual in Sub-Saharan Africa, particularly Kenya, where it is a rare surname, Tanzania, and South Africa, where it is an extremely rare surname. Much less frequently, Mbeja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mbeja | South Africa, Kenya, India, United States, Tanzania |