Family name Suwichaya (Suwichaya 
) , throughout the world, is an extremely rare surname. The family name Suwichaya is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, Suwichaya is the forename as well as the last name.
Pinta, Pairatana, Permenter, Thantakarn, Thantatarn, Thipmanee, Thongboon, Vijitpornkul, Wangphumyai, Mongkoltip, Mongkhontip, Saengmanee, Phunthumitr, Tangprasert, Wichayakul, Sriprapaporn, Chotigasupaseranee, Pruksawanich, Wiriyasirikul, Mongkhonthip, Siripongthai, Ratanapilasvanech, Klawikkarn, Kosinanon, Suwanwimolkul, Saengseejan, Modnok, Saelim, Sudjai, Putuptim, Loonsri, Jansup, Iamsai, Sothong, Chanchu, Chiammunchit, Suriyamongkol, Pannita, Sangphuwong, Supappool, Suebjakdee, Kongchum, Pruksavanich, Pumcharoen, Jansrirat, Theamtun, Manatsila, Maneewong, Santawee, and Thanapaisarnkij