Around the world, สิทธัตถ์ (สิทธัตถ์ 
) is a very rare dominantly male, but infrequently feminine first name. The forename สิทธัตถ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare largely boy's, but seldom girly name. Much less frequently, สิทธัตถ์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| สิทธัตถ์ | Thailand |
ศรีทอง, ศิลปะ, นรสิงห์, รักษ์มณี, and เพ็ชรประดิษฐ์