Cognomen Йилмаз (Yilmaz 
, Йилмаз 
) , worldwide, is a prevalent surname. The cognomen Йилмаз is habitual in Turkey, where it is a prevalent surname, Austria, where it is quite a common surname, and Kosovo (explore the name in all countries). Not in comparison with a country's population, the name is most common in Turkey, Germany, and Austria. Much less frequently, Йилмаз is the forename as well as the last name.