Cognomen Vilchek (Вильчек 
, Vilchek 
) , around the globe, is a rare family name. The family name Vilchek is habitual in Russia, where it is a rare surname, Belarus, where it is a very rare surname, and Kazakhstan. Measured by absolute frequency, it is commonest in Russia, the United States, and Belarus. Much less frequently, Vilchek is the forename as well as the last name.