Surname Калаян (Kaloyan 
, Kaloian 
, Калаян 
) , worldwide, is a rare last name. The surname Калаян is habitual in Georgia, where it is a rare surname, Bulgaria, and Armenia. Not in comparison with a country's population, it most frequently occurs in Spain, the United States, and Bulgaria. Much more frequently, Калаян is the forename as well as the last name.