Cognomen Suwitchaya (Suwitchaya 
) , globally, is an extremely rare surname. The family name Suwitchaya is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, Suwitchaya is the forename as well as the last name.
Saeno, Donghong, Duangsri, Labsangwal, Thiparat, Yuenyong, Musikasong, Siriphong, Sungvaraporn, Soratjapinan, Chaiyasin, Boonsanit, Kotcharat, Prasansak, Ruthaichamchuen, Jongthong, Thayatong, Surapornpaiboon, Chonsinthu, Khanthabud, Khunphakdee, Thongdon On, Rattarom, Kaeosahnga, Chumchasorn, Chookeaw, Suwan, Saelao, Sapsin, Subnam, Pradon, Punyai, Punhom, Jomjai, Yoenyong, Kalasuk, Chintanachukit, Kongsri, Romakom, Rotsuwannoi, Lerswisut, Lonluea, Jongpukdee, Niamhom, Fusuwan, Setthahirun, Somthong, Chanuban, Keepthong, and Rattanawichaiwanich