Cognomen Влачеслав (Влачеслав 
) , worldwide, is an extremely rare family name. The surname Влачеслав is habitual in Western Asia, particularly Armenia, where it is a rare surname. Also, Влачеслав is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Влачеслав | Armenia, Russia, Ukraine |