Cognomen Chaivat (ชัยวัฒน์ 
, Chaivat 
) , throughout the world, is a rare surname. The family name Chaivat is habitual in Thailand, where it is quite a rare surname, Canada, where it is an extremely rare surname, and the United States. Predominantly, Chaivat is the forename as well as the last name.
Somno, Trisunan, Navasinpongsuk, Seesongcram, Sriveraskul, Poonsopin, Leephaibul, Tongdonnoi, Sangkachat, Sukcharoen, Chaovanitkul, Kanogvaleevong, Promprasit, Ratchukool, Laopattanaviroj, Lohachitranond, Vitoorakool, Suwannaporn, Sriratanavudhi, Kongkitpakorn, Vachirasundaravanya, Charoenpansuthi, Jarutwacharin, Jamgrajang, Dhanarun, Rodchuajeen, Adulvong, Kansan, Sirisom, Sirirat, Arsathong, Churnun, Kongpin, Khaosun, Kheunpet, Portner, Prasertsintu, Rimterakul, Immanee, Oulansakoonchai, Yampeam, Songkroh, Sripinan, Chankaeo, Kaewjang, Ketsakorn, Kingchutchaval, Phuvadakorn, Daomanee, and Thanawattanatrakul