Family name Demourtchian (Демурчян 
, Demourtchian 
, Демурчиан ) , across the world, is a rare cognomen. The last name Demourtchian is characteristic of Russia, where it is a rare surname, Ukraine, where it is an extremely rare surname, and the United States. Very seldom, Demourtchian is the forename as well as the last name.