Surname รัตนามาศ (รัตนามาศ 
, Rattananmas) , worldwide, is a very rare cognomen. The surname รัตนามาศ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, รัตนามาศ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| รัตนามาศ | Thailand |