Cognomen Мадйар (Madiar 
, Madyar 
, Мадйар ) , across the world, is a rare family name. The cognomen Мадйар is habitual in Qatar, where it is a rare surname, Romania, and Hungary. In absolute terms, it is the most numerous in India, Indonesia, and Romania. Also, Мадйар is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Madiar | Kazakhstan, Indonesia, United States, India, Romania |
| Madyar | Kazakhstan, Italy, Qatar, India, Russia |
| Мадйар | Russia |