Surname Natthaya (ณัฐธยาน์ 
, ณัฐยา , Natthaya 
) , worldwide, is a very rare cognomen. The cognomen Natthaya is habitual in South-eastern Asia, particularly Malaysia, where it is a very rare surname, and Thailand. Predominantly, Natthaya is the forename as well as the last name.
Lila, Khemwachiraphan, Panathanyaboon, Phanthura, Thanaronnawat, Tripetchchuporn, Nambandit, Singhasiri, Sinlapasert, Chamnankit, Chiangchan, Cherngchalard, Chokkhanapitak, Phueakphon, Duangsiriamphon, Thanutrapong, Wongsuntorn, Chaichotkij, Phatthaniworachot, Limpakarnjanarat, Chaiboonrueng, Thanitthanawat, Khunaphaisan, Khongphlan, Bumrungnikom, Chabuakam, Lemke, Suksai, Sodyim, Soadyim, Tosabrudee, Toduang, Wornsuk, Burarnrak, Kungthong, Pongjit, Mongkolrattanasakul, Pothima, Horpetch, Hongbin, Vangtisan, Opastanapaisarn, Wongtha, Sakulammart, Srisavas, Tantiassawavechakul, Sitthisom, Sukityarn, Noeysoongnoen, and Thanawatchotiphakun