Surname วิริยะศักดิ์ (วิริยะศักดิ์ 
, Viriyasak ) , worldwide, is an extremely rare last name. The family name วิริยะศักดิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, วิริยะศักดิ์ is the forename as well as the last name.