Cognomen Wichaiya (Wichaiya 
, วิชัยยะ , วิไชยา ) , all around the world, is a rare surname. The last name Wichaiya is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, Wichaiya is the forename as well as the last name.
Montri, Kotchakorn, Wasanapong, Thatsanee, Thanakorn, Arunothai, Sakoontala, Sakuntala, Methichai, Wittawat, Waraporn, Tassapol, Duang Nga, Khatkhanang, Duangnga, Kanokchat, Apichart, Suttiluck, Sirayaporn, Saovanee, Saengoei, Watinee, Chalita, Anuwatw, Sunaree, Yodjai, Papada, Kraiwish, and Pongsaphat