Üçüncü is a

Turkish surname A Turkish name consists of an ''ad'' or an ''isim'' (given name; plural ''adlar'' and ''isimler'') and a ''soyadı'' or ''soyisim'' (surname). Turkish names exist in a "full name" format. While there is only one ''soyadı'' (surname) in the full na ...

. Notable people with the surname include: * Bülent Üçüncü, Turkish footballer * Hasan Üçüncü, Turkish footballer

See also