Cognomen Sunphet (Sunphet 
) , around the world, is an extremely rare last name. The cognomen Sunphet is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, Sunphet is the forename as well as the last name.
Kasa, Nilrat, Srisong, Buakhao, Phetpun, Innprom, Chaijinda, Sutthampongsa, Sornsawat, Chanching, Kaewbanjong, Prakobkit, Nakkarabundit, and Chaisiriyasawad