Cognomen ประภัทธ์ (Praphat 
, ประภัทธ์ ) , throughout the world, is a rare family name. The last name ประภัทธ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and Cambodia. Much more frequently, ประภัทธ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Praphat | Malaysia, Thailand, India, United States, Germany |
| ประภัทธ์ | Thailand |