Family name Mukaja (Mukaja 
) , in all the world, is a rare last name. The surname Mukaja is habitual in Tanzania, where it is a rare surname, Malaysia, where it is a very rare surname, and Indonesia. Very seldom, Mukaja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mukaja | Indonesia, India, Malaysia, United States, Tanzania |