Cognomen Suphoj (Suphoj 
) , in the entire world, is an extremely rare last name. The surname Suphoj is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, Suphoj is the forename as well as the last name.
Saehun, Vattanapitaksakul, Wongchotpinthong, Tiranatwittayakul, Pornsakulrut, Surintharat, Prasoptham, Hansriworapong, Nakngoenthong, Leelaapiwat, Dechaphan, Phaboonma, Prongphimai, Chancheaw, Yothinphanawes, Srisupatpongsa, Maneethip, Hemtanon, Noisakul, Jaratmongkhoncharoen, Pholharn, Changeakwong, Saengdech, Muatchuai, Muanmay, Machcha, Wannok, Onphuangrat, Ditsen, Suthamphithak, and Lertrattanaamornkul