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Cognomen Thanachai (ธนชัย , Thanachai , ธนะชัย ) , globally, is a rare surname. The cognomen Thanachai is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname, Thailand, where it is a rare surname, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Thailand, Laos, and China. Predominantly, Thanachai is the forename as well as the last name.
Wang, Torrernkham, Nissayan, Nitisamosorn, Yotsuree, Sittichai, Suborrapan, Sriviroonchai, Chanchaya, Chompatana, Khajonjarukun, Lertwachirakul, Limpadapan, Jaroenmak, Tantrakul, Thapthong, Phetcharat, Wichaiwong, Sawangphakdee, Sukittiworakul, Thanachaiary, Thirawatthada, Thayaping, Taerattanachai, Limsuwan, Riewsakunchart, Panya, Jaisue, Wongsa, Saechin, Saejueng, Singhon, Srisong, Choonam, Naksawn, Euapiyachart, Sirithanachai, Onsongkrai, Meechoke, Muaddumad, Seeviroonchai, Adsavakulchai, Boonwang, Bunphendach, Kaewpatima, Kaeosalee, Khamphon, Prasatvit, Yonsiri, and Kittirattanayothin