Surname เพชรพิชญ์ (เพชรพิชญ์ 
, Petpitcha , Petrphikhat) , throughout the world, is an extremely rare last name. The cognomen เพชรพิชญ์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Likewise, เพชรพิชญ์ is the forename as well as the last name.