Cognomen เพียรพัฒน์ (Pianphat 
, Pienpat , Pianpat ) , all over the world, is a very rare surname. The surname เพียรพัฒน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, เพียรพัฒน์ is the forename as well as the last name.