Cognomen Брильянт (Брильянт 
) , around the globe, is a very rare last name. The surname Брильянт is habitual in Eastern Europe, particularly Ukraine, where it is a very rare surname, and Russia, where it is an extremely rare surname. Much less frequently, Брильянт is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Брильянт | Kazakhstan, Ukraine, Russia |