Surname กันตธร (กันตธร 
, Kantatorn 
) , around the world, is a very rare last name. The cognomen กันตธร is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, กันตธร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| กันตธร | Thailand |
| Kantatorn | China, United States, Thailand |