Surname โอษฐ์ (O 
, โอษฐ์ 
) , around the world, is a widespread cognomen. The family name โอษฐ์ is characteristic of Venezuela, where it is a common surname, Vanuatu, where it is quite a common surname, and Myanmar (explore the name in all countries). Measured by absolute frequency, it is commonest in China, Indonesia, and Venezuela. Also, โอษฐ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| O | China, Japan, Venezuela, Indonesia, Canada |
| โอษฐ์ | Thailand |