Family name บุญสิทธิ์ (บุญสิทธิ์ 
, Boonsit 
, Boonyasit 
) , in all the world, is quite a rare surname. The cognomen บุญสิทธิ์ is characteristic of Thailand, where it is quite a rare surname, Philippines, where it is a very rare surname, and China, where it is an extremely rare surname. Much less frequently, บุญสิทธิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| บุญสิทธิ์ | Thailand |
| Boonsit | China, United States, Thailand |
| Boonyasit | United States, Cambodia, Thailand |
| Bunsit | United Kingdom, Malaysia, Philippines, United States, Thailand |