Surname Siongo (Siongo 
) , in the entire world, is a very rare last name. The surname Siongo is characteristic of Tanzania, where it is a rare surname, France, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Very seldom, Siongo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siongo | France, Tanzania, Thailand, Nigeria |