Surname ประมัย (ประมัย 
, Pramai 
) , in the entire world, is a rare last name. The last name ประมัย is habitual in Thailand, where it is a rare surname, China, where it is an extremely rare surname, and the United States. In absolute terms, it is commonest in Thailand, China, and India. More frequently, ประมัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ประมัย | Thailand |
| Pramai | United States, Thailand, India, China |