Surname Vahdettin (Vahdettin 
, Вахдеттин 
) , worldwide, is a very rare family name. The surname Vahdettin is habitual in Germany, where it is a very rare surname, Turkey, where it is an extremely rare surname, and the United Kingdom. Much more prevalently, Vahdettin is the forename as well as the last name.
An, Doğan, Güler, Işık, Yilmaz, Çakır, Çelik, Çetin, Çoban, Şahin, Aydın, Aydemir, Karahan, Korkmaz, Demirci, Yıldız, Yılmaz, Kılıç, Demirkan, Yildirim, Özdemir, Bozkurt, Aktaş, Arslan, Yavuz, Ay, Lu, Er, Can, Aksu, Acar, Kara, Kaya, Koç, Kurt, Gül, Erol, Mutlu, Sahin, Aslan, Akyol, Polat, Demir, Dogan, Turan, Engin, Öztürk, and Yıldırım