Cognomen คุณนาย (Mrs. 
, คุณนาย , Kunakhorn ) , worldwide, is a rare surname. The last name คุณนาย is characteristic of Vietnam, where it is a very rare surname, China, where it is an extremely rare surname, and Malaysia. Not in comparison with a country's population, it is the most numerous in China, Vietnam, and Thailand. Predominantly, คุณนาย is the forename as well as the last name.