Family name Kosakul (Kosakul 
) , throughout the world, is a rare last name. The cognomen Kosakul is characteristic of Thailand, where it is a rare surname, Germany, where it is an extremely rare surname, and the United States. Much less frequently, Kosakul is the forename as well as the last name.
Aey, Chintana, Chokchai, Kanchana, Krissana, Pachinee, Pennapar, Prapapun, Pornthep, Pornnapa, Leartwit, Toranich, Napassorn, Wanvadee, Yuthakan, Supatsara, Sutikamon, Arpatsara, Chaweewan, Kawinthip, Piyathida, Puttiphat, Sumontha, Warunya, Thanvudh, Jongkol, Udom, Artit, Arnut, Pikul, Juree, Samang, Saijai, Suphan, Somsak, Somrat, Duangtida, Somrar, Arporn, Amnuay, Pasana, Aiyarat, Chutima, Boonrod, Kankorn, Praphat, Pornjan, Piyawan, Anurat, and Jittraporn