Cognomen Янс (Jans 
, Янс 
) , across the world, is a common family name. The last name Янс is habitual in Western Europe, particularly Belgium, where it is quite a common surname, Netherlands, and Luxembourg. Not in comparison with a country's population, this name is the most popular in Western Europe, particularly Belgium, Netherlands, and Germany. Much less frequently, Янс is the forename as well as the last name.