Cognomen Siyaga (Siyaga 
) , throughout the world, is a very rare last name. The family name Siyaga is characteristic of Tanzania, where it is a rare surname, South Africa, where it is a very rare surname, and India, where it is an extremely rare surname. Much less frequently, Siyaga is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siyaga | Tanzania, India, South Africa, Philippines |