Surname กาญจนธัญรัตน์ (กาญจนธัญรัตน์ 
) , in the world, is a very rare last name. The cognomen กาญจนธัญรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| กาญจนธัญรัตน์ | Thailand |