Family name Santiraj (Santiraj 
) , globally, is an extremely rare last name. Much more prevalently, Santiraj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Santiraj | India, United States, Thailand |
Saman, Mandal, Mondal, Shrestha, Kulnoppakiet, Chomlamaintry, and Tangsakunwatthana