Family name Янсе (Janse 
, Янсе 
) , all over the world, is quite a common surname. The last name Янсе is characteristic of Netherlands, where it is quite a common surname, South Africa, where it is quite a rare surname, and Sweden. Not in comparison with a country's population, it is the most numerous in Netherlands, South Africa, and Belgium. Much less frequently, Янсе is the forename as well as the last name.