Last name Suwinai (Suwinai 
) , in all the world, is a very rare cognomen. The family name Suwinai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, Suwinai is the forename as well as the last name.
Saidam, Phetapirak, Ruensung, Rueansang, Thailawan, Oangsathan, Singkarash, Sirichant, Chotechaung, Chomchoei, Boonlaeaid, Kamnoeddee, Krichkraivarn, Pholsawat, Phetaphirak, Jaroensin, Thorathuek, Wattatham, Weerawong, Wongkiettikul, Kumnoeddee, Wattanakorn, Chunsiri, Aongsathan, Daoloy, Loawilas, Vimukmon, Yottha, Mannuch, Sirijnt, Srimala, Aleekasem, Kamnauddee, Ditchoidaj, Laowilas, Linniaw, Nipawan, Noiwong, Umsumarng, Sirijant, Sobanthao, Sodaying, Apainipat, Chiamngoen, and Sombatcharoennon