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