Last name Promtan (Promtan 
) , all around the world, is a rare family name. The cognomen Promtan is characteristic of Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and the United States, where it is an extremely rare surname.
Jong, Pannaton, Potchara, Potjanat, Potjanee, Tanapong, Toonkaew, Tipakorn, Watchara, Watsapon, Weerasak, Chanchira, Kasamaprom, Kritchana, Patcharee, Pimpakarn, Pimchannok, Roongpailin, Lattaphon, Narongsak, Nattapong, Wannaporn, Kanyanat, Usarassaya, Worapan, Nisarat, Suthi, Pawan, Jojoe, Niran, Banpot, Bunyok, Kumpha, Pichet, Thanwa, Veerin, Peeranuttapong, Orapin, Songsri, Kesinee, Pakawan, Penpron, Dusanee, Jenjira, Tanawat, Teelada, Narumol, Nakarin, Waplubplueng, and Pattarawadee