Cognomen Iassen (Iassen 
) , around the globe, is an extremely rare surname. The family name Iassen is habitual in Argentina, where it is an extremely rare surname, and the United States. Much more prevalently, Iassen is the forename as well as the last name.
Manov, Houbenov, Hristov, Martchev, Stoyanov, Kobarelov, Gortchov, Lazarov, Loumbarov, Vassilev, Salahadin, Anadoliev, Boutachkov, Hadjiamin, Radoslavof, Tonkovski, Ghiuselev, Deyanov, Rozanis, Kirov, Popov, Punky, Donov, Tomov, Ninov, Idris, Maznev, Michev, Sabine, Petkov, Raykov, Iankov, Alexiev, Assenov, Gueorguiev, and Trendafilov