Cognomen Matyazh (Matyazh 
, Матяж 
, Матиаж ) , worldwide, is quite a rare surname. The cognomen Matyazh is habitual in Eastern Europe, particularly Ukraine, where it is quite a rare surname, Belarus, where it is a rare surname, and Russia. Not in comparison with a country's population, this name is the most popular in Ukraine, Russia, and Kazakhstan.