Family name Siwat (Siwat 
, ศิวัช , ศิวัจน์ ) , all around the world, is a very rare last name. The family name Siwat is habitual in South-eastern Asia, particularly Malaysia, where it is a very rare surname, Thailand, and Philippines. Predominantly, Siwat is the forename as well as the last name.
Samsee, Thongsuk, Navanimitkul, Harnkhot, Veeraman, Supasalingkarn, Suwanwong, Chitnarong, Bhutiyodhin, Kitprasarn, Prakobboon, Rodprapai, Teerabudsaralak, Wongborphid, Sukkasemhathai, Boonthanom, Teeraprayoon, Trakulsakvises, Ungrangsee, Somsaktrakun, Chairattana, Phuthanasaengthong, Thainugul, Leekampan, Dumsuwan, Decharat, Sakpech, Komema, Panton, Jehteh, Sakdejayont, Serirodom, Chusrieam, Busamrong, Krueboon, Plaisen, Panchakunathorn, Rakamthong, Jaiwithee, Wayapat, Udomsin, Sarutipibol, Chatjiraluk, Bangthet, Kongphet, Klachotechai, Phiraudomphach, Puranawit, Riyaten, and Chongjaroonrangsan