Surname Janusic (Janusic 
) , in all the world, is a rare family name. The family name Janusic is habitual in Southern Europe, particularly Bosnia and Herzegovina, where it is quite a rare surname, Slovenia, and Croatia, where it is a rare surname. In absolute terms, it is commonest in Bosnia and Herzegovina, Slovenia, and Germany. Much less frequently, Janusic is the forename as well as the last name.