All around the world, สิทธิภัค (สิทธิภัค 
) is a very rare masculine forename. The forename สิทธิภัค is habitual in South-eastern Asia, particularly Thailand, where it is a very rare male name.
| VARIANT | COUNTRY |
|---|---|
| สิทธิภัค | Thailand |
วัฒนา, and วนิชเวทย์พิบูล