Cognomen Thatdao (Thatdao 
) , around the world, is an extremely rare family name. Much more frequently, Thatdao is the forename as well as the last name.
Stout, Daungklang, Khamyotchai, Khamkaeo, Koedkaeo, Phoniyom, Phialath, Panprom, Kanwitthayi, Cheenbangchang, Supkong, Saengow, Nokaew, Rakmak, Mandee, Lacer, Ropru, Sriwong, and Thongthiraphap