Throughout the world, เพชรรัตน์ (เพชรรัตน์ 
, Petcharat 
, Phetcharat 
) is a common largely feminine, but infrequently male first name. The forename เพชรรัตน์ is characteristic of Thailand, where it is quite a common largely feminine, but uncommonly male name, and the United States, where it is an extremely rare epicene name. Likewise, เพชรรัตน์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| เพชรรัตน์ | Thailand |
| Petcharat | Malaysia, Australia, United States, Thailand, Germany |
| Phetcharat | Finland, Malaysia, United States, Thailand, Germany |
| Phetrat | Japan, Thailand |
Paechrat, Paetcharat, Pechaksorn, Pecharatt, Pechcharat, Pechharat, Pechharn, Pechhuabua, Pechlueam, Pechrchawang, Pechsarat, Pechsathit, Pedcharat, Pedcharath, Pehtcharat, Pescharat, Petchahab, Petchaksorn, Petcharachuay, Petcharaet, Petcharaj, Petcharakan, Petcharakarn, Petcharakhan, Petcharakut, Petcharamnee, Petcharaphat, Petcharatda, Petcharath, Petcharatip, Petcharatl, Petcharatmune, Petcharatn, Petcharatt, Petcharatut, Petcharayon, Petcharet, Petcharops, Petcharrat, Petchcharat, Petchrart, Petchrat, Petchrattan, Petchsrat, Petchuay, Pethaksorn, Pethchara, Pethcharakarn, Pethcharat, Pethcharath,
| เพชรรัตน์ สีแก้ว Thai actor, TH (b. 1972) |
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