Cognomen Sylko (Силко 
, Sylko 
, Сылко ) , around the world, is quite a rare surname. The last name Sylko is characteristic of Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Kazakhstan. Measured by absolute frequency, it most frequently occurs in Eastern Europe, particularly Russia, Ukraine, and Belarus. Very seldom, Sylko is the forename as well as the last name.