Cognomen Belsai (Belsai 
) , in the world, is a very rare family name. The family name Belsai is characteristic of Latin America and the Caribbean, particularly Honduras, where it is a very rare surname, Venezuela, and Mexico. More frequently, Belsai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Belsai | Democratic Republic of the Congo, Spain, Mexico, India, Venezuela |