Family name Sinthawalai (Sinthawalai 
) , in all the world, is a very rare last name. The surname Sinthawalai is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
Thun, Sintha, Gemmica, Sirikarn, Autchara, Hutsathorn, Atthaphon, Chittrinee, Hussathon, and Phitchayada