Cognomen ขมา (Khama 
, ขมา 
) , in the entire world, is quite a common last name. The cognomen ขมา is habitual in Sub-Saharan Africa, particularly Lesotho, where it is quite a common surname, Botswana, and Namibia, where it is quite a rare surname. In absolute terms, this name is the most popular in Lesotho, India, and South Africa. More prevalently, ขมา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khama | Botswana, India, South Africa, Malawi, Lesotho |
| ขมา | Thailand |