Surname Cosett (Cosett 
) , in all the world, is a very rare last name. The surname Cosett is habitual in Mexico, where it is a very rare surname, Peru, where it is an extremely rare surname, and the United States. Likewise, Cosett is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cosett | United States, Peru, Mexico |