Across the world, เพชรมงคล (เพชรมงคล 
, Phetmongkol , Phetmongkhon ) is a rare principally male, but very seldom girly first name. The first name เพชรมงคล is characteristic of South-eastern Asia, particularly Thailand, where it is a rare predominantly masculine, but very infrequently feminine name. Very seldom, เพชรมงคล is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| เพชรมงคล, Phetmongkhon, Pechmogkon, Phetmongkol | Thailand |
Pechmongkol, Pechmongkon, Pecthmongkon, Petchmongkol, Petchmongkon, Petcmongkon, Pethmongkhol, Petmongkhon, Petmongkol, Petmongkon, Phechmonkol, Phetmongchum, Phetmongkhla, Phetmongkhol, Phetmongkon, Phetmongkong, and Phetrmongkhon