Family name ปิยะฤทธิ์ (ปิยะฤทธิ์ 
, Piyarit ) , in the entire world, is a very rare cognomen. The family name ปิยะฤทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, ปิยะฤทธิ์ is the forename as well as the last name.