Cognomen Madiar (Мадьяр 
, Madiar 
, Мадиар ) , all around the world, is a rare family name. The cognomen Madiar is habitual in Romania, where it is a rare surname, Hungary, and Kazakhstan. Measured by absolute frequency, it is the most numerous in Indonesia, Romania, and India. More frequently, Madiar is the forename as well as the last name.