Last name Onderet (Onderet 
) , all around the world, is a very rare cognomen. The surname Onderet is habitual in Western Europe, particularly Belgium, where it is a rare surname, and France, where it is a very rare surname. Much less frequently, Onderet is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onderet | France, Belgium |
| maurice onderet Belgian-Canadian violinist and pedagogue, CA (b. 1899) |
|