Surname Vacheslav (Вачеслав 
, Vacheslav 
) , all over the world, is an extremely rare cognomen. The surname Vacheslav is characteristic of Canada, where it is an extremely rare surname, Ukraine, and Russia. Measured by absolute frequency, it most frequently occurs in the United States, Canada, and Ukraine. Much more prevalently, Vacheslav is the forename as well as the last name.