Cognomen พรถนอม (พรถนอม 
) , worldwide, is an extremely rare surname. The family name พรถนอม is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, พรถนอม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พรถนอม | Thailand |