Surname Gûndûz (Гюндюз 
, Gûndûz) , around the globe, is a very rare last name. The cognomen Gûndûz is characteristic of Armenia, where it is a rare surname, Belarus, and Ukraine, where it is a very rare surname. In absolute terms, it is the most numerous in Eastern Europe, particularly Russia, Ukraine, and Belarus. Much less frequently, Gûndûz is the forename as well as the last name.