Cognomen เพ็ญจิรา (เพ็ญจิรา 
, Penjira 
) , in all the world, is an extremely rare last name. The last name เพ็ญจิรา is habitual in Southern Asia, particularly India, where it is an extremely rare surname. More prevalently, เพ็ญจิรา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เพ็ญจิรา | Thailand |
| Penjira | India, United States, Thailand |