All around the world, Koosuwan (Koosuwan 
) is an extremely rare unknown gender given name. Much more frequently, Koosuwan is the last name as well as the forename.
Kom, Pacharaporn, Pattanachat, Wongsakkorn, Theerasak, Pacharporn, Khiangsak, Kaweewong, Vibulsak, Jiraporn, Ratikorn, Kritsada, Kritsana, Kornphol, Chidphan, Harikan, Nattaya, Tanawat, Julthida, Piyawat, Penchan, Kedwalee, Kornwika, Kanokkwan, Supanee, Wanida, Ekapol, Kerkul, Arporn, Waris, Prapatsorn, and Warinthorn