Cognomen Onmany (Onmany 
) , all over the world, is a very rare family name. The last name Onmany is characteristic of Laos, where it is quite a rare surname, and Canada, where it is an extremely rare surname. Very seldom, Onmany is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onmany | Canada, Laos, United States |