Surname Siswoko (Siswoko 
) , worldwide, is quite a rare last name. The cognomen Siswoko is characteristic of Indonesia, where it is a rare surname, Malaysia, where it is a very rare surname, and Netherlands. Very seldom, Siswoko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siswoko | Indonesia, Malaysia, Netherlands |