Family name Wongsiya (Wongsiya 
) , in all the world, is an extremely rare last name. The cognomen Wongsiya is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, Wongsiya is the forename as well as the last name.
Sanrak, Preeyawattana, Prasertsilp, Somprasong, Wongpisan, Thongoopakarn, Lerttriluck, Khwankaew, Phatcharapisutsin, Buddeesak, Kopkitwatana, Kaewmukda, Boon-Long, Sangwari, Whitney, Limloreritkun, Pongtem, Tinnimit, and Wattanathanakul