Surname Вассилий (Vassiliy 
, Vassily 
, Вассилий ) , in the entire world, is a very rare last name. The surname Вассилий is habitual in Slovakia, where it is a rare surname, Kazakhstan, where it is a very rare surname, and the United States, where it is an extremely rare surname. In absolute terms, the name is most common in the United States, Slovakia, and France. More prevalently, Вассилий is the forename as well as the last name.