Cognomen Siwkratok (Siwkratok 
) , in the entire world, is an extremely rare last name. The last name Siwkratok is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Siwkratok | Thailand |
ซิวกระโทก, สิวกระโทก, and สิ่วกระโทก