Cognomen ปิยะดิษฐ์ (ปิยะดิษฐ์ 
) , around the world, is a very rare surname. The cognomen ปิยะดิษฐ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, ปิยะดิษฐ์ is the forename as well as the last name.