Cognomen Колю (Колю 
, Kolyu 
, Koliu 
) , in the entire world, is quite a common surname. The cognomen Колю is habitual in Bulgaria, where it is quite a common surname, Estonia, where it is quite a rare surname, and Finland, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Bulgaria, Estonia, and Malaysia. Also, Колю is the forename as well as the last name.