All over the world, Köseoglu (Köseoglu 
) is an extremely rare unknown gender first name. Much more prevalently, Köseoglu is the last name as well as the forename.
Ali, Ebru, Hava, Isra, Onur, Okan, Zeki, Umut, Ugur, Meral, Melih, Metin, Memet, Mecit, Murat, Mutlu, Salim, Sabri, Sahin, Sinan, Sibel, Serap, Ekin, Seref, Emre, Eray, Aka, Can, Isa, Mert, Mine, Sami, Sait, Sadi, Seda, Sefa, Adem, Akin, Ayse, Cuma, Buse, Kaan, Taha, Nese, Nuri, Elif, Esra, Erol, and Selen