Family name พระธรรม (Dharma 
, Thoedtham 
, พระธรรม ) , throughout the world, is a common last name. The surname พระธรรม is characteristic of Indonesia, where it is quite a common surname, Qatar, where it is quite a rare surname, and United Arab Emirates. Measured by absolute frequency, it is commonest in Indonesia, India, and Nepal. More prevalently, พระธรรม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dharma | Nepal, India, Indonesia, Sri Lanka, Saudi Arabia |
| Thoedtham, Praphatham, พระธรรม | Thailand |
Dhammaraks, Dharminder, Jthamas, Monktham, Pattatham, Patthamma, Phakatham, Phradham, Phradharma, Phrakatham, Phramanas, Phratham, Phrmtham, Pradham, Prapatham, Prathamma, Prathankham, Prathas, Rithamma, Suthamma, and Takhamma