Surname Masiaga (Masiaga 
) , in all the world, is a rare last name. The surname Masiaga is habitual in Tanzania, where it is a rare surname, Kenya, and Norway, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Tanzania, Kenya, and Indonesia. Much less frequently, Masiaga is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Masiaga | Norway, Tanzania, Brazil, Indonesia, Kenya |