Cognomen Cadet-Petit (Cadet-Petit 
) , in all the world, is a very rare last name. The family name Cadet-Petit is habitual in Western Europe, particularly France, where it is a very rare surname. Parts of the name also exists independently as a last name Cadet, and a last name Petit.
| VARIANT | COUNTRY |
|---|---|
| Cadet-Petit | France |