Cognomen ประไพรเพชร (ประไพรเพชร 
, Praphraiphetch) , all over the world, is a very rare surname. The last name ประไพรเพชร is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, ประไพรเพชร is the forename as well as the last name.