Surname Юнассон (Jonasson 
, Юнассон 
) , across the world, is quite a common family name. The cognomen Юнассон is habitual in Northern Europe, particularly Iceland, where it is a common surname, Sweden, where it is quite a common surname, and Denmark, where it is quite a rare surname. In absolute terms, it is the most numerous in Sweden, Iceland, and Canada. Much less frequently, Юнассон is the forename as well as the last name.