Cognomen Morduhai (Мордухай 
, Morduhai) , throughout the world, is a rare family name. The cognomen Morduhai is habitual in Belarus, where it is a rare surname, Ukraine, where it is a very rare surname, and Kazakhstan. In absolute terms, this name is the most popular in Eastern Europe, particularly Belarus, Ukraine, and Russia. Much less frequently, Morduhai is the forename as well as the last name.