Family name Влассов (Vlassov 
, Влассов 
) , all around the world, is a rare last name. The cognomen Влассов is habitual in Estonia, where it is quite a rare surname, Lithuania, where it is a rare surname, and Czechia. Not in comparison with a country's population, it most frequently occurs in Estonia, Russia, and the United States. Much less frequently, Влассов is the forename as well as the last name.