Family name Васілюк (Wasiluk 
, Васілюк 
) , worldwide, is quite a rare last name. The cognomen Васілюк is habitual in Poland, where it is quite a rare surname, Argentina, where it is a rare surname, and Ukraine, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Poland, the United States, and Argentina. More prevalently, Васілюк is the forename as well as the last name.