Last name Siwiti (Siwiti 
) , globally, is quite a rare family name. The family name Siwiti is habitual in Tanzania, where it is quite a rare surname, South Africa, where it is an extremely rare surname, and the United States. Much less frequently, Siwiti is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siwiti | Canada, Tanzania, India, United States, South Africa |