Surname Дуяр (Duyar 
, Дуяр 
) , all over the world, is a common cognomen. The cognomen Дуяр is habitual in Turkey, where it is quite a common surname, Austria, where it is a rare surname, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Duyar | Turkey, Germany, Austria, Algeria, Myanmar |
| Дуяр | Kazakhstan, Russia, Ukraine |