Cognomen Sittising (Sittising 
) , around the globe, is a very rare last name. The family name Sittising is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sittising | Thailand |
Sompol, Phakruepas, Nungruthai, Waraporn, and Thanpisith