Surname Rattanathai (Rattanathai 
) , across the world, is a very rare cognomen. The family name Rattanathai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
Ratisak, Sutharat, Phongrat, Nathraweporn, Pornwimol, Phutnambuth, Phayakkhin, and Chananchida