Cognomen นิยมศักดิ์ (นิยมศักดิ์ 
, Niyomsak ) , across the world, is a rare last name. The last name นิยมศักดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Also, นิยมศักดิ์ is the forename as well as the last name.