Family name Karnjanaporn (Karnjanaporn 
) , in the world, is an extremely rare surname. The surname Karnjanaporn is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more frequently, Karnjanaporn is the forename as well as the last name.
Sukteh, Muangjaiphet, Varintaravach, Thongprong, Loetpanyasap, Prommaband, Setthawong, Jaipakdee, Chimsawat, Chaprasert, Chaisuwan, Thongdam, Thongmak, Wongwiriyaskul, Bantaopit, Ukkasettung, Yamsiri, Wongdee, Tongdam, Tongmak, Riyaboot, Poochin, Parnpan, Arundorn, Artphinitnarong, Tonsri, Boonma, Chaipanha, and Sirikulpiyarat