Family name ปิยะนัส (Piyanat 
, ปิยะนัส , Piyanus ) , worldwide, is a very rare cognomen. The cognomen ปิยะนัส is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much more prevalently, ปิยะนัส is the forename as well as the last name.
สีดาสน์, ศรีพิไล, แสนสุข, จงพัฒนากิจเรือง, and ปิยะรัชชนันทน์