Cognomen Onechanh (Onechanh 
) , around the world, is quite a rare family name. The surname Onechanh is characteristic of Laos, where it is quite a common surname, France, where it is a very rare surname, and Thailand. In absolute terms, this name is the most popular in Laos, France, and the United States. Very seldom, Onechanh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onechanh | Canada, Thailand, France, Laos, United States |