Family name Вилько (Vilko 
, Вилько 
) , worldwide, is a rare last name. The surname Вилько is habitual in Slovenia, where it is quite a rare surname, Finland, where it is a rare surname, and Kazakhstan, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Russia, Slovenia, and Finland. More frequently, Вилько is the forename as well as the last name.