Throughout the world, บลรัตน์ (บลรัตน์ 
) is a very rare principally feminine, but very seldom boy's given name. The first name บลรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare predominantly feminine, but very seldom male name.
| VARIANT | COUNTRY |
|---|---|
| บลรัตน์ | Thailand |