In the entire world, Васлав (Васлав 
, Vaslav 
) is a very rare masculine first name. The first name Васлав is habitual in Eastern Europe, particularly Ukraine, where it is a very rare masculine name, and Russia, where it is an extremely rare male name. Likewise, Васлав is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Васлав | Kazakhstan, Ukraine, Russia |
| Vaslav | Romania, Italy, Mexico, United States, India |