Family name Элиассон (Eliasson 
, Элиассон, Elíasson ) , worldwide, is a common surname. The cognomen Элиассон is habitual in Sweden, where it is quite a common surname, Iceland, and Guinea-Bissau, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Sweden, the United States, and Iceland. Very seldom, Элиассон is the forename as well as the last name.