Last name เพ็ชรวรรณ (เพ็ชรวรรณ 
) , worldwide, is a very rare cognomen. The cognomen เพ็ชรวรรณ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, เพ็ชรวรรณ is the forename as well as the last name.