Cognomen Kuyumchyan (Kuyumchyan 
, Куиумчиан , Куюмчян 
) , around the world, is a rare surname. The cognomen Kuyumchyan is characteristic of Russia, where it is a rare surname, Ukraine, where it is a very rare surname, and Kazakhstan. Measured by absolute frequency, it most frequently occurs in Russia, Ukraine, and the United States.