Surname Rattanachaya (Rattanachaya 
) , in the world, is a rare last name. The surname Rattanachaya is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
Udom, Thanatchaya, Kallayarat, Hongsawet, Phatchara, Krittiporn, Kamonmarn, Worachai, Wanchana, Wannarat, Nattakit, Lavittra, Phungthong, Chattraporn, Kittisak, Kamolrat, Chairoek, Aekkapon, Sujittra, Umaporn, Onanong, Natanon, Kitsuwat, Korawan, Suttiya, Loesak, Aparat, Kunyukon, and Patcharaporn