Family name سيوك (Siok 
, سيوك) , across the world, is quite a rare last name. The surname سيوك is characteristic of Malaysia, where it is quite a rare surname, Singapore, where it is a rare surname, and Poland. Measured by absolute frequency, it is the most numerous in Malaysia, Indonesia, and the United States. Likewise, سيوك is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siok | Singapore, Poland, United States, Indonesia, Malaysia |