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Family name ปิยะพัฒน์ (ปิยะพัฒน์ , Netitorn , Piyapatr ) , worldwide, is a very rare last name. The cognomen ปิยะพัฒน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more prevalently, ปิยะพัฒน์ is the forename as well as the last name.