Surname มุจรินทร์ (มุจรินทร์ 
, Mujarin 
, Mutcharin ) , throughout the world, is a rare last name. The surname มุจรินทร์ is habitual in Thailand, where it is a rare surname, Malaysia, where it is an extremely rare surname, and the United States. In absolute terms, it is the most numerous in Thailand, India, and Malaysia. Likewise, มุจรินทร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| มุจรินทร์ | Thailand |
| Mujarin | Philippines, Thailand, United States, India, Malaysia |
| Mutcharin | Thailand, Malaysia |