Family name Khammay (Khammay 
) , globally, is a rare cognomen. The family name Khammay is characteristic of South-eastern Asia, particularly Laos, where it is quite a rare surname. More prevalently, Khammay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khammay | Canada, Laos, France, United States, Thailand |