Cognomen Thanachaya (Thanachaya 
) , across the world, is an extremely rare last name. Much more frequently, Thanachaya is the forename as well as the last name.
Laee, Dejsubha, Upanun, Chodokmai, Polyiam, Namkham, Chimwong, Thiandee, Vongaroonniyom, Pichaikam, Lavananont, Laojumpol, Kaewwongsa, Nonthawarangkul, and Wacharaprechanont