Cognomen อด (Ot 
, อด 
) , in the entire world, is a common last name. The cognomen อด is habitual in Mongolia, where it is quite a common surname, Saudi Arabia, where it is quite a rare surname, and Botswana. Measured by absolute frequency, it is the most numerous in Mongolia, Saudi Arabia, and Turkey. Much less frequently, อด is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ot | Saudi Arabia, Mongolia, Morocco, Indonesia, Turkey |
| อด | Thailand |