Surname เพชรพันธุ์ (เพชรพันธุ์ 
) , across the world, is a very rare family name. The family name เพชรพันธุ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, เพชรพันธุ์ is the forename as well as the last name.