Cognomen ราชขันธ์ (Rajkhan 
, ราชขันธ์ 
) , in the world, is a rare surname. The cognomen ราชขันธ์ is characteristic of Saudi Arabia, where it is quite a rare surname, Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. In absolute terms, it is commonest in Saudi Arabia, Thailand, and India. Much less frequently, ราชขันธ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rajkhan | India, United States, Saudi Arabia |
| ราชขันธ์ | Thailand |