Last name นุกูลรัตน์ (นุกูลรัตน์ 
, Nukulrat , Nukoonrat ) , around the globe, is a rare surname. The cognomen นุกูลรัตน์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, นุกูลรัตน์ is the forename as well as the last name.