Surname Phongsit (พงษ์สิทธิ์ 
, Phongsit ) , in the entire world, is a very rare last name. The cognomen Phongsit is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much more prevalently, Phongsit is the forename as well as the last name.
Misa, Khampang, Kromchawa, Paladkong, Painpayungpong, Prasalak, Promnarong, Phanphai, Phoseedee, Daengpathet, Tuntikomol, Hongkham, Wansanit, Saksriwan, Sittiwang, Klongklaw, Phongkerdsuk, Phothisan, Phramchuen, Apisittikul, Longthongkoon, Thongsaner, Chamnian, Apaitool, Yuwansri, Nawiang, Suwan, Raman, Sittuwang, Akabut, Aiedlou, Chaona, Baykhloy, Krabao, Dumrat, Dumrak, Inthongkaew, Thanon, Maorasri, Moonsri, Sawwarun, Charoen, Chonlertwarakorn, Khamtui, Prommin, Phatson, Phibool, Nansiri, Zurück, and Phaiboonsawat