Cognomen เย็นบุญธรรม (เย็นบุญธรรม 
) , throughout the world, is a very rare last name. The surname เย็นบุญธรรม is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| เย็นบุญธรรม | Thailand |