Cognomen นิลาวรรณ์ (นิลาวรรณ์ 
) , all over the world, is a very rare family name. The surname นิลาวรรณ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, นิลาวรรณ์ is the forename as well as the last name.