Cognomen Donruthai (Donruthai 
) , in the world, is an extremely rare last name. Much more frequently, Donruthai is the forename as well as the last name.
Kraium, Jaiyen, Chumsod, Wonglek, Meethong, Satchenpong, Sujariya, Srisuwan, Phongpoka, Longprasert, Yuwaphathanawong, Anantanarong, Wongnongwang, and Siripornprasit