Last name Грегорян (Gregorian 
, Грегорян 
) , across the world, is a rare surname. The cognomen Грегорян is characteristic of Ireland, where it is a rare surname, Romania, and Hungary. Not in comparison with a country's population, it is commonest in the United States, Romania, and Indonesia. Very seldom, Грегорян is the forename as well as the last name.