Surname Kwanruthai (Kwanruthai 
) , all over the world, is an extremely rare family name. Much more prevalently, Kwanruthai is the forename as well as the last name.
Suwan, Putchana, Punthong, Rassamee, Thongson, Suphaphon, Sritiansuk, Sriwichai, Chaitawat, Chaichana, Chaengdee, Boonphokong, Khummanee, Perraudin, Pongviset, Pothikasikorn, Jensirikan, Thiamngoen, Mongkonkobchai, Chomputhep, Jaingammuang, Jiamrattanophat, Krobroop, Kaewjampa, Chufamanee, Chaiburi, Gonod, Sittha, Chaiya, Bunrod, Puprom, Rakdee, Tadpetch, Telfer, Hmenpannarai, Wisiksiwit, Wangkietkajon, Chaisri, Kamwang, Kongjan, Rotpitthaya, Duendao, Thasiri, Wongngren, Yodrabum, Sanitdee, Siritorn, Angsanan, Buaphan, and Boontanachortchai