Surname โอมา (Oma 
, Omah 
, โอมา 
) , across the world, is a common last name. The cognomen โอมา is habitual in Equatorial Guinea, where it is quite a common surname, Norway, where it is quite a rare surname, and Oman. Not in comparison with a country's population, it most frequently occurs in Nigeria, Indonesia, and Morocco. More frequently, โอมา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oma | Indonesia, Ethiopia, Nigeria, United States, India |
| Omah | Indonesia, Morocco, Nigeria, United States, India |
| โอมา | Thailand |