In the world, Billiet (Billiet 
) is a very rare gender-neutral given name. The first name Billiet is characteristic of Western Europe, particularly Belgium, where it is a very rare boy's name. Much more prevalently, Billiet is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Billiet | France, Argentina, Australia, United States, Belgium |
| balthazard billiet FR (b. 1818) |
|