Cognomen อริยธรรม (อริยธรรม 
, Ariyatham 
) , around the world, is an extremely rare last name. The surname อริยธรรม is habitual in Thailand, where it is an extremely rare surname, Canada, and the United States.
| VARIANT | COUNTRY |
|---|---|
| อริยธรรม | Thailand |
| Ariyatham | Canada, United States |