Surname Йерун (Jeroen 
, Йерун 
) , around the globe, is a rare family name. The family name Йерун is characteristic of Belgium, where it is quite a rare surname, Netherlands, where it is a rare surname, and Hungary. Measured by absolute frequency, it is commonest in Belgium, Netherlands, and China. Predominantly, Йерун is the forename as well as the last name.