Surname Yakubyan (Якубян 
, Якубйан , Yakubyan 
) , in the world, is a very rare cognomen. The cognomen Yakubyan is characteristic of Bulgaria, where it is a rare surname, Russia, where it is a very rare surname, and Kazakhstan. Not in comparison with a country's population, it is the most numerous in Russia, Bulgaria, and the United States. Likewise, Yakubyan is the forename as well as the last name.