Cognomen โอช (Ot 
, โอช 
) , around the world, is a common family name. The cognomen โอช is habitual in Mongolia, where it is quite a common surname, Saudi Arabia, where it is quite a rare surname, and Botswana. In absolute terms, it is commonest in Mongolia, Saudi Arabia, and Turkey. Much less frequently, โอช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ot | Indonesia, Morocco, Saudi Arabia, Mongolia, Turkey |
| โอช | Thailand |