Surname Вацлаў (Václav 
, Vaclav , Wacław 
) , in all the world, is quite a rare last name. The last name Вацлаў is habitual in Slovakia, where it is quite a common surname, Czechia, and Cyprus, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Eastern Europe, particularly Czechia, Slovakia, and Poland. Much more frequently, Вацлаў is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Václav, Vaclav | Czechia, Germany, Slovakia, United States, Poland |
| Wacław | Czechia, Germany, Lithuania, United States, Poland |
| Вацлаў | Belarus |
Vaclau, Vaclaw, Vatslau, Vatslav, Vencel, Venceslao, Venceslav, Ventseslav, Venčeslav, Viachaslau, Viatcheslav, Vjacseszlav, Vjatjeslav, Vjatšeslav, Vjačeslav, Vyachaslau, Vyachaslaw, Vyacheslav, Vácslav, Věnceslav, Waclaw, Wenceslao, Wenzel, Wenzeslaw, Więcesław, Wjatscheslaw, В'Ячеслав, Вацлав, Венцел, Венцель, Венцеслав, Венчеслав, Вячаслав, Вячаслаў, Вячеслав, and Слава