Family name มนต์เพชร (มนต์เพชร 
, Monpetch , Monphet 
) , throughout the world, is a very rare cognomen. The surname มนต์เพชร is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Likewise, มนต์เพชร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Monpetch, มนต์เพชร | Thailand |
| Monphet | United States, Thailand |
Monphetch, and Montonphetch