Cognomen Yongchaiyudh (Yongchaiyudh 
) , around the globe, is a very rare last name. The surname Yongchaiyudh is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname, and Cambodia, where it is a very rare surname.
Gen Chavalit, Monthira, Chavalit, Thanarath, Napassawan, Natthaphat, Natthapong, and Suchanachai