Around the world, บุตรสี (บุตรสี 
) is a very rare unisex forename. The forename บุตรสี is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare gender-neutral name. Likewise, บุตรสี is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| บุตรสี | Thailand |