Family name รัตติธรรม (รัตติธรรม 
, Rattidham 
) , all around the world, is a very rare surname. The cognomen รัตติธรรม is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| รัตติธรรม | Thailand |
| Rattidham | United States |