Cognomen Khwankao (Khwankao ) , around the world, is an extremely rare last name. Much more frequently, Khwankao is the forename as well as the last name.
Kantip, Phurahong, Chitkament, and Damjamnong
) , around the world, is an extremely rare last name. Much more frequently, Khwankao is the forename as well as the last name.