Family name Еспен (Espen 
, Еспен 
, Espens 
) , in the entire world, is quite a rare surname. The cognomen Еспен is habitual in Belgium, where it is quite a rare surname, Luxembourg, and Norway. Not in comparison with a country's population, it most frequently occurs in Belgium, Norway, and Italy. More frequently, Еспен is the forename as well as the last name.