Family name Wichachai (Wichachai 
) , throughout the world, is a rare cognomen. The cognomen Wichachai is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Wichachai is the forename as well as the last name.
Bow, Apisara, Aekchai, Kannika, Kanjana, Korakod, Korakit, Pornpan, Pinyada, Tanrada, Nattaya, Nakarin, Vharada, Wararak, Withaya, Wichuda, Worawut, Saowalak, Supattra, Chularat, Kanchana, Kanyarat, Suwicha, Sudarat, Saranya, Maliwan, Aree, Nana, Manee, Sakda, Sa Em, Amara, Kanit, Titan, Halit, Oraya, Kalyarat, Suparp, Achara, Chayon, Penpuk, Prasit, Phusit, Jariya, Tawita, Natcha, Orawan, Watson, Anucha, and Kongkiat