Last name Janyawat (ธัญวัฒน์ 
, Janyawat ) , globally, is a very rare family name. The surname Janyawat is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more frequently, Janyawat is the forename as well as the last name.
Phudjuntuek, Lauhachinda, Saksuriya, Sumonsiriwong, Sriwongchai, Chaichana, Koontaraneeranun, Piyoungkanon, Danupatwaratorn, Laisiripan, Jantawong, Eungrattanagron, Suwannarit, Jirajariyawat, Throngtraitrong, Trongtraitrong, Vanajaruroj, Charoonphoemphoon, Chursaaad, Wangcharoen, Srijaikaew, Moonsarn, Nipkhan, Ekchayanon, Vuthijumnonk, Amesbutr, Chumree, Khottip, Panploy, Poohirun, Phasuhirannikorn, Punjunkam, Rakjidtawong, Laiphukum, Thabjan, Ongauea, Yaemkan, Unjanam, Mahaphon, Sriraksa, and Prasoprattanachai