Last name Ясен (Yasen 
, Jasen 
, Ясен 
) , in all the world, is a common family name. The surname Ясен is habitual in Egypt, where it is quite a common surname, Syria, where it is quite a rare surname, and Iraq. Not in comparison with a country's population, the name is most common in Egypt, China, and Iraq. Also, Ясен is the forename as well as the last name.